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Archive 2012 · Lens performance on Mirex
  
 
johnahill
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p.1 #1 · p.1 #1 · Lens performance on Mirex


Hi All
I'm thinking of replacing my Oly 35 shift (MC version) with a Mirex tilt/shift adapter with a few Mamiya 645 lenses.

Can anyone tell me what the stopped-down corner performance is like on full 15mm shift for say the 35/3.5N, the 55/2.8 and any others of note?

My main use use will be for PC control and for shift pano's, although I've never used tilt before i'm sure i'll find a use for it.



May 12, 2012 at 10:39 AM
johnahill
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p.1 #2 · p.1 #2 · Lens performance on Mirex


Also any experience with how those lenses handle flare?


May 12, 2012 at 10:43 AM
JohnJ
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p.1 #3 · p.1 #3 · Lens performance on Mirex


I have that gear gear (Mirex, 35, 45, 55 N lenses) but have never really used them that way, as I mainly use them for tilt rather than shift, and never for panoramas. If you don't get any answers I can shoot a few tests in a few days. Just can't do it before then.

JJ



May 12, 2012 at 11:30 AM
jcolwell
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p.1 #4 · p.1 #4 · Lens performance on Mirex


Hi John,

I think the newer N and A versions of M645 lenses are all relatively good at handling flare. These lenses have higher contrast and perhaps better flare handling than earlier 'plain' C versions. I generally use a hood when shooting, and I have a compendium hood from my Mamiya Auto Bellows N setup that works well for tilted/shifted lenses.

The lens price database, Lens$db, has a complete list of the N and A versions (bar a couple of leaf shutter lenses), and many of the C versions. Note that the N versions also have a C in their name, but not the A versions, no C that is.

The image quality at full shift is generally very good, the 55N is a bit better here than the 35N (mostly due to vignetting), but they're still usable. Of course, you often don't need full shift on the Mirex, even for shift-panos. Most other shift lenses only go to 12mm, while the Mirex goes to 15mm. With the Mirex at 10mm to 12mm shift, there's no significant image degradation, especially when compared to other shift lenses at 10mm to 12mm shift, which is their max movement.

All of the A-series lenses are of note. They're as good as anything else available, including "35mm format" Zeiss and Leica (except different, of course). The A 120/4 Macro and A 150/2.8 are real bargains, as they're far less expensive than the other 'Alternatives'. The A 200/2.8 APO is fantastic, but unfortunately it's price has been steadily rising for the past few years. The A 300/2.8 APO is also fantastic, but it's rare and not better than the Canon 300/2.8L IS. I've owned fifteen of the twenty-one different M645 prime lenses shown in Lens$db. The only 'notable' ones I haven't tried are the 24/4 Fisheye and 500/4.5 telephoto. I now own the Canon TS-E 24/3.5L II and EF 500/4L IS, so these last two 'notable' M645 lenese are no longer on my radar screen.

I normally use the 35/3.5N, 55/2.8N, 80/2.8N, and A 150/2.8 with the Mirex for T-S images. Although, they're just as good IQ-wise 'straight up', as most of my Canon L primes (at common apertures). I normally use the 80/4N Macro, A 120/4 Macro, and A 200/2.8 APO 'straight up' with fixed Fotodiox Pro adapters. I use the Auto Bellows N system when I want to do tilt-shift macro shooting.

The N series enses for all focal lengths from 35mm up to and including 80mm are all really, really good. The 45/2.8N is an excellent lens, too (on par with the 35N and 55N), but I sold mine because I always went to either the 35N or 55N. The C 50/4 Shift is very nice, but relatively large and heavy. For a while I toyed with the idea of using it on the Mirex for supershift, but I sold it instead.

The C 150/3.5N, C 210/4N and C 500/5.6 aren't anything special. The IQ of the C 150/3.5N breaks down with moderate tilt and shift past about 8mm (the A 150/2.8 does not - it's great). I've heard good things about the C 110/2.8, but I haven't tried it. Based on the C 150 and C 210, I won't bother trying the C 300/5.6. Besides, it's getting a bit long to use T-S, and I already have the very nice Tamron SP 300/5.6 for 'straight up' shooting.

Here's some relevant links that you have probably seen, but what the heck.

Cheers, Jim

http://www.fredmiranda.com/forum/topic/969706
http://www.fredmiranda.com/forum/topic/957325
http://www.fredmiranda.com/forum/topic/881094
http://www.fredmiranda.com/forum/topic/878520
http://www.fredmiranda.com/forum/topic/727356/0&year=2009#6586359
http://www.fredmiranda.com/forum/topic/711581
http://www.fredmiranda.com/forum/topic/700049/0#6362826
http://www.fredmiranda.com/forum/topic/685096
http://www.fredmiranda.com/forum/topic/696092/0

Lens$db: http://tinyurl.com/jcolwell-lensdb



May 12, 2012 at 11:54 AM
johnahill
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p.1 #5 · p.1 #5 · Lens performance on Mirex


Cheers guys, great help.

Went through some old threads yesterday and founf a youtube video, really impressed with the engineering on the mirex. I had originally thought it could only shift to one side and then have to be rotated to the other side.

Really need to weigh up the options of this versus a nodal pano setup of some sort and as I already have l-brackets and a novoflex rail I think all I would need is a panning base. But of course the Mirex brings to the table perspective correction and tilt in addition to the shift pano usage. hmmmmmm...............



May 12, 2012 at 12:47 PM





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