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12-17-2008, 08:16 AM   #1
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promaster 100mm f3.5 (cosina)

happy holidays to all.....

e-ay has a promaster 100mm f3.5 (cosina?)....
has anyone had experience with this lens...
there are limited reviews, one calls it plastic fantastic.....
i'm looking for an inexpensive, relatively fast prime...
100mm range....
the listed lens is 119 free shipping

thanks and regards... dcmsox2004

12-17-2008, 10:01 AM   #2
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Cosina has made some fine glass over the years. They make lenses for a numer of famus labels, such as Vivitar and Voigtländer and others. The new Voigtländer F1.4 comes to mind. I have a Cosina brand 28-70mm F2.8 which is very sharp.

Dave

QuoteOriginally posted by dcmsox2004 Quote
happy holidays to all.....

e-ay has a promaster 100mm f3.5 (cosina?)....
has anyone had experience with this lens...
there are limited reviews, one calls it plastic fantastic.....
i'm looking for an inexpensive, relatively fast prime...
100mm range....
the listed lens is 119 free shipping

thanks and regards... dcmsox2004
12-17-2008, 11:30 AM   #3
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The 100/3.5 has also appeared under Vivitar and even Pentax brands. I bought one (Vivitar) on eBay but it turned out to be a Minolta mount, part of the thrill of eBay. Anyway its build is OK, not inspiring: it is all plastic. It's a lot lighter than the other macros in that 100mm range. Most reviews say it works well for macro, but I wonder how well it would work as a general purpose prime if you're concerned about factors other than sharpness. I believe this lens only goes to 1:2 without an adapter, which might not be included.
12-17-2008, 12:24 PM   #4
clm
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It's also available new as a Phoenix at B&H.
Phoenix | Telephoto 100mm f/3.5 Macro MF Lens | P09031 | B&H

12-17-2008, 01:11 PM   #5
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I've owned this lens and it's really quite good optically. As it is, it will shoot 1:2 (1/2 life sized) and they have a filter diopter that gives 1:1 lifesized images. I wouldn't buy the lens without that part if possible. But it's the cheapest way to get a decent macro lens.

Build quality is another issue. It's built like a Fisher Price Toy and feels flimsy. But mine held up well for a couple of years and was about the same as new when I sold it.

I would get it from B&H if the price s the same. They will take it back if there's an issue.
12-18-2008, 05:00 AM   #6
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I have one of these, in original Cosina branding. I'll post some photos from it later when I get home. It's a fairly decent lens, and I think it's one of those hidden gems (well, depending on the price you paid for it). It's literally a plastic-fantastic lens, since, as Peter mentioned, build quality is pretty shoddy compared to other lenses, especially old metallic ones. Mine is still working like new, though, so I'm not too concerned about it.

Lemme get back to this post later.
12-18-2008, 05:19 AM   #7
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You can read the reviews of the Pentax version (same lens with SMC coatings added) right on the review data base here. Pentax Lens Review Database - 100mm F3.5 Macro
12-18-2008, 10:13 AM   #8
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Here's a link to the first few shots I took with the Cosina lens. It links to a Multiply album.

Sorry for having to link through to another site. I got home pretty late from work.

12-18-2008, 11:17 AM   #9
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as always, thanks to my fellow pentaxians.....
the pentax 100mm 3.5 is something i'd never 'tripped' over....
happy holidays to all!!!
12-21-2008, 02:07 PM   #10
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ProMaster 100mm f3.5

Just received one of these from Wolfes Camera on eBay - love it. Focus ring is tight, body is plastic, mounting ring is metal. Works best on 'manual' on my K200D. Have two pics of guitars:
Red guitar - 6 feet away with Kenko 2x teleconverter - original in RAW - no touchups.
Black guitar - 7 feet away - straight lens - slight lightening in Elements 6.

Love the lens - just waiting for spring and some bugs to shoot.
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12-21-2008, 05:31 PM   #11
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QuoteOriginally posted by claskowski Quote
Works best on 'manual' on my K200D.
You got that right! Leaving it on AF, the sound the lens makes when focusing is enough to make me worry that I might be breaking the lens.

And of course, it's slow as molasses.
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