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03-03-2010, 02:54 PM   #1
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645D crop view

I was sort of grumbling to myself about the new 645D and the reduced format, making my 35mm lens less wide. But on the other hand I recall several pics that I have taken, especially with the Harblein 45mm T/S, that had a lot of vignetting that I could not see in the viewfinder. I also saw my feet or my hat in a lot of the 30mm Arsat fisheye and the 35mm/3.5 shots.

So I looked up the viewfinder in the regular 645 and found that it only showed 92% of the view, ergo my vignetting problems. Assuming that the new 645D will have live view, it will only crop to 88% of full 645 frame (assuming a 49mmx37mm sensor).

So, assuming live view, I'm happy.

Warren

03-10-2010, 12:03 PM   #2
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The 645D viewfinder has 98% coverage.
03-12-2010, 04:05 AM   #3
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QuoteOriginally posted by Laurentiu Cristofor Quote
The 645D viewfinder has 98% coverage.
Yes. 645D has no LV, a 44x33mm sensor (an 1.27x crop of 41.5x56mm film) and an 98% VF (of that cropped region).
03-13-2010, 07:39 AM   #4
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QuoteOriginally posted by falconeye Quote
... and an 98% VF.
I'm curious why 98% not 100%.
Is the last 2% very difficult to achieve?

03-13-2010, 05:18 PM   #5
D W
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QuoteOriginally posted by Kguru Quote
I'm curious why 98% not 100%.
Is the last 2% very difficult to achieve?
No getting 100% is not a problem, getting 100% accurately is the issue. That is why most SLR's show 95-98% to cover the margin of error. In a mounted 35mm slide you are getting less than 100% of the frame.
03-13-2010, 05:25 PM   #6
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QuoteOriginally posted by D W Quote
No getting 100% is not a problem, getting 100% accurately is the issue. That is why most SLR's show 95-98% to cover the margin of error. In a mounted 35mm slide you are getting less than 100% of the frame.
That sort of thing is usually margin of error - else someone will go and set out just to prove you wrong.
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