Too Small, Too Big - Ichneumon Wasp
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Too Small, Too Big - Ichneumon Wasp
Sometimes I come across a specimen that is too small for 5x and sometimes too big for 8x. I could use a 1.4 extender with the Canon MPE-65mm and bring it up to 7x or use extension tubes to bring it up to 6x. I thought I'd try reducing the tube length from 250mm (recommended for the Zeiss 10x infinity) down to between 135 and 200mm (no marking for 150mm) on the Sigma 70 - 300mm lens. I guesstimate I would be around 167mm tube length with an effective magnification of about 6.7x. The combo had a slight vignetting which was acceptable to me with a Canon 30D (1.6 crop factor camera). My thought process could be way off base, sorry for babbling...
Ichneumon wasp at about 6.7x with Zeiss 10x infinity, 47 steps at 30µm.
Ichneumon wasp at 12x with Zeiss 10x infinity, 101 steps at 10µm.- MarkSturtevant
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