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Re: [OM] seeemingly simple question....

Subject: Re: [OM] seeemingly simple question....
From: Nathan Wajsman <photo@xxxxxxxxxxxxxx>
Date: Fri, 30 Jun 2017 20:45:02 +0200
You are not missing anything. The maximum aperture is the same regardless of 
format. What does change is the apparent depth of field for a given distance, 
focal length and aperture. The larger the format, the shallower the DOF, 
holding those 3 parameters constant.

Cheers,
Nathan

Nathan Wajsman
Alicante, Spain
http://www.frozenlight.eu <http://www.frozenlight.eu/>
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> On 30 Jun 2017, at 15:00, Bill Pearce <billcpearce@xxxxxxx> wrote:
> 
> I just read a news story on the web about a new 80mm Fuji lens for their med. 
> format system. Although he couldn't calculate the effective focal length for 
> the lens on the mf camera, he was easily able to state that as an 80/1.4 
> lens, it would be  an f1.0 lens on the mf camera. Forgive me but I'm 
> confused. I remember that when I was shooting large format that we considered 
> the 5.6 lens on our 8x10 still a 5.6 lens on our 4x5. What am I missing out 
> here? I've seen this business on the web before, but it doesn't make sense to 
> me. 
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