astrophotography tales of trial & error · 2004-01-22 · the motion of the stars can cause...
TRANSCRIPT
![Page 1: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/1.jpg)
Dave & Marie Allen
AstrophotographyTales of Trial & Error
AVAC 13th April 2001
![Page 2: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/2.jpg)
Contents
Photos Through Camera Lens
1 Star trails2 Piggy back
Photos Through the Telescope
3 Prime focus4 Photo through the eyepiece5 Eyepiece projection
Increasing magnification
![Page 3: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/3.jpg)
Camera Basics
When the photograph is being exposed, the light is directed onto the film. The viewfinder is completely black.
Usual photographic rules apply:
Less light ! Longer exposuresHigher f number ! Longer exposures
Light directed to viewfinder
Light directed to film
![Page 4: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/4.jpg)
Star Motion
Stars rise and set – just like the Sun in the daytime.The motion of the stars can cause problems for astrophotography
![Page 5: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/5.jpg)
Star Motion
Stars rise and set – just like the Sun in the daytime.The motion of the stars can cause problems for astrophotography
![Page 6: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/6.jpg)
Star Motion
Stars rise and set – just like the Sun in the daytime.The motion of the stars can cause problems for astrophotography
![Page 7: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/7.jpg)
Star Motion
Stars rise and set – just like the Sun in the daytime.The motion of the stars can cause problems for astrophotography
![Page 8: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/8.jpg)
Star Motion
Stars rise and set – just like the Sun in the daytime.The motion of the stars can cause problems for astrophotography
Tracking the motion of the stars during the exposure is called “guiding”.
Requires a polar aligned mount and periodic corrections to keep the subject stationary relative to the camera.
Done using slow motion controls – or more often with dual axis correctors.
![Page 9: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/9.jpg)
Guiding
No – but tracking helps
Photo through the eyepiece
Guiding Required?Photography Technique
No – but tracking helps
Eyepiece projection
YesPrime focus
YesPiggy back
NoStar trails
![Page 10: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/10.jpg)
Mount the camera on a tripodPoint at starsOpen the shutter for 30 mins to 2 hours
Red Rock Canyon50mm lens @ f2100 ASA Film~1 hour exposure
Can you tell which directionThe camera was pointing?(North, South, East or West)
Star Trails
![Page 11: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/11.jpg)
Creative Freedom
•Composition•Camera Angle / Direction•Field of View•Silhouette / Illuminated Foreground
•Subjects•Aurora•Meteor Showers•Dramatic Foreground
Creative Freedom
•Composition•Camera Angle / Direction•Field of View•Silhouette / Illuminated Foreground
•Subjects•Aurora•Meteor Showers•Dramatic Foreground
Equipment
•Sturdy tripod•Locking cable release•Camera with ‘B’ setting•Patience
Problems
•Lights – Film is sensitive to light pollution•Photo Developers – Unusual to get dark skies from photo lab•Framing – Difficult to see foreground
Star Trails
Solutions
•Find dark site or use light to help with composition•Write “Astronomy Photos – Please Expose For Dark Sky” on envelope (or use custom developer)•Practice !
![Page 12: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/12.jpg)
Example Star Trails
Red Rock Canyon50mm lens @ f2100 ASA Film~1 hour exposure
![Page 13: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/13.jpg)
Example Star Trails
Saddle Back Butte28mm lens @ f2.8100 ASA Film~1 hour exposure
![Page 14: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/14.jpg)
Piggy Back Astrophotography
Mount camera on top of equatorially mounted telescopeAim at subject and carefully track the movement of the starsOpen the shutter for 5 mins to 2 hours
Nebulosity in Orion
Quartz Hill300 mm lens @ f4.5800 ASA Film~20 min exposure
Auto guided
![Page 15: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/15.jpg)
Creative Freedom
•Composition – Limited Options•Field of View (Focal Length of Lens)•Special Effects with Filters
•Subjects•Constellations•Large Galaxies
Creative Freedom
•Composition – Limited Options•Field of View (Focal Length of Lens)•Special Effects with Filters
•Subjects•Constellations•Large Galaxies
Equipment
•Equatorial mount (or “Barn Door” mount)•Brackets – camera to telescope / counter weight shaft•Locking cable release•Camera with ‘B’ setting•Guiding equipment•Lots of Patience
Problems
•Lights, Photo Developers, Framing•Polar Alignment – Essential to minimize ‘Field Rotation’•Exposure
•Low contrast if too short•Sky fog if too long
•Guiding – Difficult to prevent stars drifting
Piggy Back Astrophotography
![Page 16: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/16.jpg)
Piggy Back AstrophotographyProblems
•Polar Alignment – To prevent ‘Field Rotation’•Exposure for dim subjects
•Low contrast if too short•Sky fog if too long
•Guiding – Difficult to prevent stars drifting
Solutions
•Declination drift or polar alignment scope•Bracket exposures
•Use fast film (400 ASA or faster)•Need dark sky
•Need a guiding eyepiece or auto guider
Auto guidersRelentless precision of machineExpensive (5x cost of eyepiece)Limited applications
Guiding EyepieceHuman precision (!)Needs constant attentionMultiple uses
![Page 17: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/17.jpg)
Example Piggy Back Photographs
Andromeda Galaxy
Red Rock Canyon500 mm lens @ f8800 ASA Film~45 mins exposure
Auto guided
![Page 18: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/18.jpg)
Example Piggy Back Photographs
Horse head Nebula (NGC B33)
Quartz Hill300 mm lens @ f4.5800 ASA Film
(Enlargement of previous photograph)
Auto guided
![Page 19: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/19.jpg)
Prime Focus Astrophotography
Orion Nebulae (M42 & M43)
Quartz HillC8 Telescope @ f6.3800 ASA Film15 min exposure
Auto guided
Mount camera to look through telescopeAim at subject and carefully track the movement of the starsOpen the shutter for 1/1000 sec to 2 hours
![Page 20: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/20.jpg)
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Extended Deep Sky Objects
•Galaxies•Globular Clusters•Nebulae
•Sun & Moon
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Extended Deep Sky Objects
•Galaxies•Globular Clusters•Nebulae
•Sun & Moon
Equipment
•Telescope with equatorial mount•Camera adapter•Focus equipment•Locking cable release•Camera with ‘B’ setting•Guiding equipment
•Guide scope•Off axis guider
•Even More Patience!!
Prime Focus Astrophotography
Problems
•Lights, Photo Developers, Framing•Polar Alignment, Guiding, Exposure•Guiding (again)!•Focusing – subjects may be invisible !
![Page 21: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/21.jpg)
Guiding Prime Focus Photos
Not always easy to reach focus with eyepiece
Small and light
Can sometime be difficult to find a guide star in the field of view
Good accuracy – uses the focal length of the telescope
MinusPlus
Off Axis Guiders
![Page 22: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/22.jpg)
Guiding Prime Focus Photos
Flex between telescope and guide scope causes guiding errors
Independent focusing of camera and guiding eyepiece / auto guider
Less accurate than off axis guider
More bulky equipmentEasy to find guide stars
MinusPlus
Separate Guide scope
![Page 23: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/23.jpg)
Focusing Invisible Subjects
There are a huge number of gadgets to help with focusing.This indicates the seriousness of the problem!!
Film plane focusing Bright focusing screens
Focusing masks Viewfinder magnifiers
![Page 24: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/24.jpg)
Example Prime Focus Photos
Whirlpool Galaxy (M51)
Quartz HillC8 @ f10800 ASA Film~30 mins exposure
Auto guided
(Enlargement)
![Page 25: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/25.jpg)
Example Prime Focus PhotosOrion Nebulae(M42, M43 & NGC 1977)
Quartz HillC5 @ f6.3800 ASA Film~15 mins exposure
Auto guided
![Page 26: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/26.jpg)
Example Prime Focus PhotosPinwheel Galaxy (M33)
Mount PinosC8 @ f10800 ASA Film~60 mins exposure
Auto guided
![Page 27: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/27.jpg)
Example Prime Focus Photos
Crab Nebula (M1)
Quartz HillC8 @ f10800 ASA Film~45 mins exposure
Auto guided
(Enlargement)
![Page 28: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/28.jpg)
Example Prime Focus Photos
Hercules Cluster (M13)
Saddle Back ButteC8 @ f10800 ASA Film~15 mins exposure
Auto guided
![Page 29: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/29.jpg)
Lagoon Nebula
Quartz HillC8 @ f10800 ASA Film20 min exposure
Example Prime Focus Photos
![Page 30: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/30.jpg)
Example Prime Focus Photos
Moon
Quartz HillC8 @ f10200 ASA Film1/125 sec exposure
Recognize any features?
![Page 31: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/31.jpg)
Example Prime Focus Photos
Aristoteles
Eudoxus
Mare Serenitatis
Mare Tranquillitatis
Apollo 11 Landing Site
Theophilus
Prime Focus Photos HaveCorrect Orientation
![Page 32: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/32.jpg)
Example Prime Focus Photos
WARNING!
Use solar filter over objective!Cover / remove finder scope!Remove Telrad!Do not look at the sun!
Sun
Quartz HillC5 @ f10100 ASA Film1/1000 sec exposure
Quartz HillC8 @ f10100 ASA Film1/1000 sec exposure
![Page 33: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/33.jpg)
35mm Field Of View - Prime Focus
Long side (deg) = 2073 / focal length (mm)Short side (deg) = 1382 / focal length (mm)
Examples:
2032 mm: 1.02º * 0.68º (40 X)1280 mm: 1.62º * 1.08º (26 X)1270 mm: 1.63º * 1.09º (25 X)800 mm: 2.59º * 1.73º (16 X)500 mm: 4.15º * 2.76º (10 X)300 mm: 6.91º * 4.61º ( 6 X)200 mm: 10.3º * 6.91º ( 4 X)135 mm: 15.4º * 10.2º (2.7X)100 mm: 20.7º * 13.8º ( 2 X)Pi
ggy
Bac
kPr
ime
Focu
s
Subject Selection
Suggestions
M51 – Whirlpool GalaxyM42 – Orion Nebula
Rosette NebulaM31 – Andromeda Galaxy
Veil Nebula
![Page 34: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/34.jpg)
Subject Selection
8” Schmidt Cassegrain
Prime focus @ f10 - 1.02º x 0.68º
Telrad Finder
6 x 30 Finder(7 x 50 Finder inside)
Prime focus @ f6.3 - 1.62º x 1.08º
5” Schmidt Cassegrain
Finders
Prime focus @ f6.3 - 2.59º x 1.73º
Prime focus @ f10 - 1.63º x 1.09º
35mm Field of View
Transparent sheet overlay
Used for framing subjects
![Page 35: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/35.jpg)
Photo Through The Eyepiece
Mount camera & lens to look through telescope eyepieceAim at subject and carefully track the movement of the starsOpen the shutter for 1/1000 sec to 2 sec
Moon – Mare Humorium
Quartz Hill
135mm Lens @ f2.8C8 @ f10 24mm Eyepiece800 ASA Film1/2 sec exposure
Gassendi
![Page 36: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/36.jpg)
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Moon / Planets
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Moon / Planets
Equipment
•Telescope•Tripod•Camera
Photo Through The Eyepiece
Problems
•Exposure – automatic settings may work•Blurred image – tripod helps
Note – This works great with Video Cameras !!
![Page 37: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/37.jpg)
Example Photos Through The Eyepiece
Moon – Mare Humorium
Quartz Hill
135mm Lens @ f2.8C8 @ f10 24mm Eyepiece800 ASA Film1/2 sec exposure
Mersenius
![Page 38: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/38.jpg)
Example Photos Through The EyepieceMoon – Mare HumoriumQuartz Hill135mm Lens @ f2.8C8 @ f10 24mm Eyepiece800 ASA Film1/2 sec exposure
![Page 39: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/39.jpg)
Eyepiece Projection Photography
Moon – Mare Humorium
Quartz Hill
C8 @ f 1015mm lens @ 150mm
800 ASA Film1/2 sec exposure
Mount camera body to look through telescope eyepieceAim at subject and carefully track the movement of the starsOpen the shutter for 1/1000 sec to 2 sec
![Page 40: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/40.jpg)
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Moon / Planets
Creative Freedom
•Composition – Limited Options•Field of View (Telescope Focal Length)
•Subjects•Moon / Planets
Eyepiece Projection Photography
Problems
•Exposure•Blurred image – tripod helps•Unsteady atmosphere can degrade image•Focus is more critical
Equipment
•Telescope with equatorial mount•Camera adapter•Focus equipment•Locking cable release•Camera with ‘B’ setting•Objective cover
![Page 41: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/41.jpg)
Eyepiece Projection Photography
Comment
This is VERY difficult
Not forgiving of focus errorsEven slightest vibration can ruin picture
visual back
Insert eyepiece
Screw on adapter
Add Camera
Eyepiece Projection Focal Ratio
focal ratio = f * dist to film / eyepiece fl
= 10 * 150 / 15 = 100
Focal length = 100 * 200 = 20,000 mm
Magnification = 20,000 / 50 = 400X
![Page 42: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/42.jpg)
Example Eyepiece Projection Photos
Jupiter
Quartz Hill
C8 @ f 1015mm lens @ 150mm
800 ASA Film1/2 sec exposure
Digitally Enhanced
![Page 43: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/43.jpg)
Example Eyepiece Projection Photos
Jupiter
Quartz Hill
C8 @ f 1015mm lens @ 150mm
800 ASA Film1/2 sec exposure
Original Image
![Page 44: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/44.jpg)
Example Eyepiece Projection Photos
Saturn
Quartz Hill
C8 @ f 1015mm lens @ 150mm
800 ASA Film1 sec exposure
![Page 45: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/45.jpg)
Example Eyepiece Projection PhotosMoon – Sinus IridumQuartz HillC8 @ f 1015mm lens @ 150mm800 ASA Film1/2 sec exposure Bianchini – 25 miles wide
![Page 46: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/46.jpg)
![Page 47: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/47.jpg)
Acknowledgments
Marie Allen – Patience and Understanding
Martin Gerhold & John Eakin – Scanning Photographs
Bill Ellison – Driving Van to Red Rock Canyon
![Page 48: Astrophotography Tales of Trial & Error · 2004-01-22 · The motion of the stars can cause problems for astrophotography Tracking the motion of the stars during the exposure is called](https://reader033.vdocuments.site/reader033/viewer/2022041615/5e3ad6e5c255d700e3057c4e/html5/thumbnails/48.jpg)
The End