Originally Posted by
uphereinmytree
The 200mm imagon will DEFINITELY cover 4x5 and more! I use one all the time on 4x5 with movements and certainly at portrait distance on 5x7. The 'image circle' of 150mm is ridiculous. It is more likely that it has 150mm of corner to corner fine resolution. On 4x5 and wide open, the corners are a bit smeary with low resolution and I like it. It gets sharp all over as it's stopped down. No disrespect to the "imagon instructions', but in the real world it's great on 4x5. I never use the 'strainer' discs. They are for very controlled lighting situations. Also, I've never had to do any focal corrections with infrared film which I shoot 90% of the time.
included image is on 4x5 wide open, no disc, infrared film
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