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07-26-2015, 12:44 AM   #1
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645 28-45 on film

Hi,

I know it i officially not desigened for full 645. But it is nothing new many lenses without using the hood can serve a bigger image circle than claimed in the specifications.
Has anyone tried using a 28-45 on film yet?

Thanks for your answers!

07-26-2015, 04:05 AM   #2
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I'd like to know too. Chances are it'll probably cover towards the long end of the zoom from 35mm or so.
07-26-2015, 05:04 PM   #3
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I have 645N, it would be nice to have that answer. If the Pentax continue with the strategy of your lenses d-fa Full frame, excluding the one we're not sure.
should we 645 full frame we will have some new lenses and many old to take advantage of the new camera.
07-26-2015, 07:19 PM   #4
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I have the lens and the 645N. I will see what the viewfinder shows me tomorrow.

07-27-2015, 03:49 AM   #5
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QuoteOriginally posted by itshimitis Quote
I have the lens and the 645N. I will see what the viewfinder shows me tomorrow.
The 645N has a viewfinder coverage of 94/92% horizontal/vertical, which equates to a 52.6 x 38.18mm of the 56 x 41.5mm film area, while digital full-frame 645 is considered to be 54 x 40mm.

Either way, the viewfinder will show less of the actual area than what's captured on film, so keep that in mind.
07-27-2015, 02:11 PM   #6
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I put one on a 645N and very slight darkening of the corners at 28mm; gone by 29-30mm, but as pointed out above, viewfinder is less than 100%
07-27-2015, 04:33 PM   #7
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Isn't the image circle of this lens published somewhere?
07-28-2015, 12:33 AM   #8
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QuoteOriginally posted by Thomas Quote
I put one on a 645N and very slight darkening of the corners at 28mm; gone by 29-30mm, but as pointed out above, viewfinder is less than 100%
Well, that's already better than I was expecting, if it ends up being usable by 30mm, that'd be the equivalent of 19mm in small format.

The word "usable" might have different meanings for a lens maker and photographer, even if it's simply not very sharp at the edges or has a lot of vignetting, I would still consider that usable in some cases.

Would be too much to ask of you to sacrifice a slide of film to see what the image looks like at 28mm?

QuoteOriginally posted by lats Quote
Isn't the image circle of this lens published somewhere?
Nope, you'll find that very little is known about the IC coverage of just about evey lens that isn't intended for tech cameras.

If you were to buy a full-frame lens, it's pretty much expected that you'll use it on a camera that at most has a sensor of 36x24mm, even though the IC of lenses intended for this format can vary quite widely, with some having been tested to cover an area as large as 40x40mm.

Meanwhile, lenses with reduced image formats, such as those for APS-C variants of many DSLRs, are physically modified to not be able to fit on full-frame, so it's usually not known either as people don't want to modify their lenses just to find out.


Last edited by Kolor-Pikker; 07-28-2015 at 12:43 AM.
07-28-2015, 07:54 AM   #9
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So it lloks like at least for photos using a wider format than the original 4:3 is would work even at 28mm.
Also remember slide mounts are cutting a bit, too. And when dealing with negatives, cutting a very smal fractions shouldn't be a problem either.
07-28-2015, 10:35 AM   #10
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I wonder if the film-margin data imprinting will work with this lens. Anyone shoot some film with this lens on a 645N or 645NII with the data imprinting on?
07-28-2015, 07:57 PM   #11
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QuoteOriginally posted by Kolor-Pikker Quote
....................................

Would be too much to ask of you to sacrifice a slide of film to see what the image looks like at 28mm?
I will, but I may take awhile since I rarely use film nowadays. I really wanted to try the 25mm D FA on film, but never had the opportunity.
08-03-2015, 05:23 PM   #12
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I put my zoom on my 645n and it seemed there was coverage … but now I'm really curious. I will have to actually put some film in the camera.
08-03-2015, 05:43 PM   #13
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If you can put pictures to it would be perfect, very curious if this lens covers 645 ff.
02-02-2016, 02:52 PM   #14
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News ? someone came to test the lens in the film?
02-04-2016, 02:44 PM   #15
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I'll be receiving my 28-45mm (for my 645D) in about 1 weeks' so I'll try it on my 645Nii then.
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