Re: Hasselblad C 250 f/5.6 Superachromat on Fuji GFX
^^^
That is an excellent and true point, and one that I've written about elsewhere. I used the diagonal measure because a) lots of folks start with that and b) in and easier thread I used the more complex and accurate model and folks didn't like that! I prefer to use the actual height/width measurements of the aspect ratio I prefer. For example, since I tend to prefer 4:3, I think of losing pixels from my full-frame camera when I compare it to miniMF. Essentially I regard the 36 x 24 sensor to be a 32 x 24 sensor.
The following chart shows three possible comparisons.
Dan
(This post was also shortened in light of being somewhat tangential to the original subject.)
Re: Hasselblad C 250 f/5.6 Superachromat on Fuji GFX
^^^
That is an excellent and true point, and one that I've written about elsewhere. I used the diagonal measure because a) lots of folks start with that and b) in and easier thread I used the more complex and accurate model and folks didn't like that!
I do think of diagonally measurement-derived crop factors, but I prefer to use the actual height/width measurements of the aspect ratio I prefer. For example, since I tend to prefer 4:3, I think of losing pixels from my full-frame camera when I compare it to miniMF. Essentially I regard the 36 x 24 sensor to be a 32 x 24 sensor.
When comparing the 3:2 formats to the 4:3 formats, there are three basic scenarios.
1. The photographer will make full use of whichever aspect ratio is used on the camera he/she is using, for example using 4:3 with miniMF and 3:2 with full frame.
2. The photographer will use 3:2 with whatever camera he/she is using. This would necessitate cropping the 4:3 sensor images, losing pixels and altering the crop factor relationship in a way that is unfavorable to miniMF.
3. The photographer will use 4:3 with whatever camera he/she is using. This would necessitate cropping the 3:2 sensor images, losing pixels and altering the crop factor relationship in a way that is unfavorable to full frame. (This is the circumstance that aligns with my practice.)
The following chart shows three possible comparisons.
From left to right:
The first case represents using the entire frame of both formats.
The second case represents cropping full-frame formats to 4:3
The third case represents cropping miniMF formats to 3:2
Dan
May 11, 2018 at 03:51 PM
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