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Hasselblad

 
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Harald



Joined: 13 May 2011
Posts: 594
Location: Steinberg, Norway

PostPosted: Sat Dec 07, 2019 1:48 pm    Post subject: Hasselblad Reply with quote

Hi good people,

One question about Hasselblad HC 210mm f/4.0...

Will this work as a tube for the well known Mitutoyo 5x and 10x on my Hasselblad H2 with Phase One P30+?

Thanks for your time Very Happy
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Harald

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enricosavazzi



Joined: 21 Nov 2009
Posts: 1232
Location: Borgholm, Sweden

PostPosted: Sat Dec 07, 2019 3:44 pm    Post subject: Re: Hasselblad Reply with quote

Harald wrote:
Hi good people,

One question about Hasselblad HC 210mm f/4.0...

Will this work as a tube for the well known Mitutoyo 5x and 10x on my Hasselblad H2 with Phase One P30+?

Thanks for your time Very Happy

I don't know about that specific lens, but:

The sensor is 44 by 33 mm, so this is significantly larger than full frame. With a 200 mm tube lens, you can cover up to full frame with some (not all) Mitutoyo M Plan Apo objectives, but likely not your sensor.

Unless you are prepared to crop in post-production to eliminate dark corners, you should instead use a tube lens of longer focal length. 300 mm should be enough to avoid vignetting with all M Plan Apos. 250 mm likely works with some of them, but perhaps not all. However, to be sure you should seek advice from other photographers who have tested combinations of these tube lens focal lengths and objectives.

Magnification on-sensor is a function of focal length of the tube lens. 300 mm will give you 1.5 times the nominal objective magnification.
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Lou Jost



Joined: 04 Sep 2015
Posts: 4121
Location: Ecuador

PostPosted: Sat Dec 07, 2019 4:22 pm    Post subject: Reply with quote

Quote:
300 mm will give you 1.5 times the nominal objective magnification.


Yes, but for some people it can be misleading to think about magnification when sensor sizes differ. Better to think about the actual FOV. If you put the objective on a tube lens of 250mm (actually 244mm) on your medium format sensor, you will get essentially the same image as you would get with that same objective on a 200mm tube lens on a FF camera.

So if your tube lenses don't themselves cause vignetting (and that is hard to predict), if you are happy with the images you make with a 200mm tube lens on a FF camera, you will be just as happy with the image made with a 250mm tube lens on your Hasselblad.
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