I have a Letus 1st generation 35mm adapter. I removed the flip image mirroring system to make it more compact. Now I have access directly to the grounding glass but there is lot of vignetting and stuff so I will use an achromat.
The question is, should I use a 72mm achromat and attach it to the Canon HF10 (37mm) with step up rings, or use a 52mm achromat and use step up rings on both sides? What will give the best results?
Choosing the right achromat for 35mm adapter
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