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Medium format 50mm lens; closeups

 
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NikonUser



Joined: 04 Sep 2008
Posts: 2575
Location: southern New Brunswick, Canada

PostPosted: Sun Nov 22, 2009 8:04 am    Post subject: Medium format 50mm lens; closeups Reply with quote

Recently purchased, at a local auction for a very low price, a 50mm f2.8 Bronica Zenzanon-E lens for a 6x4.5cm medium format Bronica ETRSi.

This lens has a 62mm diam filter thread and is readily attached, reversed, to a Nikon bellows via a BR2A nikon mount and a 52-62mm ring.

At full bellows extension the FOV on a 23.6mm sensor is 4.1mm for a 5.76x magnification, WD=6cm (2.25").
At minimum bellows extension the FOV is 10mm for a 2.36x mag.

Top: left: full frame at max bellows, f/5.6, 48 frames @ 0.05mm, ZS PMax,
Top right: lens reversed on minimum bellows extension.
Bottom: crop.

Compares favourably with the Nikon 4x CF N Plan objective
HERE

NU09248

NU09249
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NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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Cactusdave



Joined: 09 Jun 2009
Posts: 1631
Location: Bromley, Kent, UK

PostPosted: Sun Nov 22, 2009 8:35 am    Post subject: Reply with quote

You are very lucky to have got this very high quality lens cheaply.
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Leitz Ortholux 1, Zeiss standard, Nikon Diaphot inverted, Canon photographic gear
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ChrisR
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Joined: 14 Mar 2009
Posts: 8396
Location: Near London, UK

PostPosted: Sun Nov 22, 2009 10:54 am    Post subject: Reply with quote

Looks good enough to me, but the 4x is still better though isn't it? Looking eg between the eyes - unless the lighting's making a difference?
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g4lab



Joined: 23 May 2008
Posts: 1434

PostPosted: Sun Nov 22, 2009 11:29 am    Post subject: Reply with quote

Aren't Zenzanons and Bronicas, really Nikkors and Nikons???
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dmillard



Joined: 24 Oct 2006
Posts: 571
Location: Austin, Texas

PostPosted: Sun Nov 22, 2009 11:45 am    Post subject: Reply with quote

Congratulations NU,

It looks like you've found a sharp lens with a healthy working distance!

Regards,
David
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 8396
Location: Near London, UK

PostPosted: Sun Nov 22, 2009 11:57 am    Post subject: Reply with quote

Weren't the later ones Tamron?
I had the dubious pleasure of doing medical photos with one of the ECTLs with Nikkor lenses and bellows. They were so sharp it wasn't an issue. We had newer cameras with Zenzanon lenses, and there were cerainly no "objective" complaints, but there will always be guys who love to say that anything new isn't as good..
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NikonUser



Joined: 04 Sep 2008
Posts: 2575
Location: southern New Brunswick, Canada

PostPosted: Sun Nov 22, 2009 12:00 pm    Post subject: Reply with quote

Thanks everyone.
Chris: Lighting makes a huge difference but I think the 4x objective gave a better image.

However, there are lots of these large lenses on ebay for the Bronica 6x4.5. The Bronica system is somewhat archaic and the line was discontinued in 2004 . A professional system using film that did not keep up with the switch to digital.
Some are still expensive but there's currently the 75mm brother of the 50mm on ebay "Buy it Now" for $59.95.
HERE
On Nikon bellows this lens will give magnifications from 1.28-3.37x (on a 23.6mm sensor) and WDs of 3.5-4.5". Have not checked image quality yet (I bought a 75mm as well Very Happy)
_________________
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 8396
Location: Near London, UK

PostPosted: Sun Nov 22, 2009 12:35 pm    Post subject: Reply with quote

Quote:
However, there are lots of these large lenses on ebay for the Bronica 6x4.5

Aren't there!!
You can guess what I've been looking at for the last 10 minutes!
I'm thinking some would be very good for 24x36 sensors, for a very useful combination of WD and Mag.

And my old bellows has tilt and shift... Very Happy
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PaulFurman



Joined: 24 Oct 2009
Posts: 595
Location: SF, CA, USA

PostPosted: Mon Nov 23, 2009 10:51 am    Post subject: Reply with quote

Were you stopped down a little? Amazing such a big lens works on such tiny stuff!
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