Robert's Ramblings

At first look there is nothing special about this image but the story behind why I took it is quite interesting.

The task was determine which combination made a better image. Either 1000mm using a 500mm F8.0 mirror lens in combination 2x converter or 400mm using a 200mm F2.8 prime in combination with the same 2x converter.

The results were quite interesting and will make good material for further investigation. The 1000mm combination certainly had the magnification but the resolving performance for fine detail was quite poor. Even when scaled down to the same image magnification of the 400mm combination the 400mm still had the edge in resolving some detail in low contrast regions. On the other hand there was a softness in the 1000mm image which was also appealing and made what fine detail was resolved look more natural.

Well I choose the 1000mm in the end but for small web content is was a line call on choice.


Photo: Robert Rath, '366 Days of 2012, Day 69 - Full Moon'. 1/50 sec at 1000mm f/16, ISO 250