equipment

Astro Tips

If you've ever wondered whether it's possible to use a Meade CCD or SBIG ST4 autoguider with a Celestron mount...it is: here is a document that describes my experience at working out how, seeing as no one at Meade or Celestron or on the newsgroups could tell me at the time, although that was in 1998.

Canon 200mm f2.8L Lens Test

Star tests with the Canon 200mm f2.8L II lens and 1.4x and 2x teleconverters.

Canon 200mm f2.8L II lens


10D Centre 100% 10D Corner 100% 35mm Film Corner

f2.8

Canon 28-135mm Lens Test

Star tests with the Canon 28-125mm lens.

Canon 28-135mm f3.5 - 5.6 IS USM @28mm


Centre 100% Corner 100%

f3.5

20mm Wide Angle Lens Test

20mm Wide Angle Test

These photos were taken on a fixed tripod using autofocus on the centre of the image. These images are 100% crops from near the corner of the original.



Sigma 20mm
f1.8 EX DG

Canon EF-S 10-22mm
f3.5-4.5

Film Tips

This info is many years old, but perhaps still useful for some! It's a long time since I used any of these..

Finding good astrophotography films is tedious, especially when you have only a limited number of nights and don't want to risk them trying new films. Below are some of my thoughts on films I have used.

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