From: Paul Carmichael <wibbleypants@gmail.com>
Subject: Re: Physical size of lenses
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From: Paul Carmichael <wibbleypants@gmail.com>
Newsgroups: rec.photo.digital
Subject: Re: Physical size of lenses
Date: Wed, 29 Nov 2017 17:06:03 +0100
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El 29/11/17 a las 16:25, nospam escribió:
> In article<f87fa0Fh1fjU1@mid.individual.net>, Paul Carmichael
><wibbleypants@gmail.com> wrote:
> 
>> On my desk in front of me are two lenses. Both Samyang primes. One is a 35mm
>> f1.4 and the other is an 85mm f1.4.
>>
>> I'm just curious as to why the 35mm is so much physically longer than the
>> 85mm.
> 
> retrofocus design


Yeah, when I was googling it earlier, I bumped into a piece about why 50mm lenses are so 
much cheaper than 35mm. The article referred to retrofocus.

I also just remembered, my 35mm Samyang has aperture control from body, so I assume 
there's extra gubbins for that (motor etc.).


-- 
Paul.

  https://paulc.es/
  https://asetrad.org