Quote:
Originally Posted by gregbradley
I am now using Pentax 67 F4, 55mm, 165mm and 300mm.
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How's the field with the 165mm?
Tried the 200mm last night, one stop down ( nearly fully opened) and I had a very good field, flat to the corners with no aberrations. It pretty much worked out of the box surprisingly. Found focus, etc.... The built-in telescopic hood is also very convenient. I didn't have to use any dew heaters. Although it was very windy and dry with bad seeing and a blazing moon I managed to do 7h worth.
Love the field and image scale. I got a shot around the prawn extending from all the surrounding clusters back o the dark tower with enough details to zoom up close. Going for seconds tonight and I'll have some good stuff to process soon.