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Drosovila
Joined: 23 Jan 2017
Posts: 6
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 Posted: Sun Apr 23, 2017 8:24 pm Post subject: Cosina 50mm f/2 (Spoiler: It's good) |
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Drosovila wrote:
Didn't really expect much from this plastic lens, which I got for free. Looks like I was wrong....
Heres some pics (and matching 100% crops) from my first walk with it.
Taken on a fuji xpro (asp-c sensor) with some light postprocessing.
At f/2 the centre is already quite sharp and contrasty but the edges are quite smeary.
centre @ f/2
corner @ f/2
At f/5.6 everything sharpens up quite nicely.
centre @ f/5.6
corner @ f/5.6
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Oldhand
Joined: 01 Apr 2013
Posts: 6008
Location: Mid North Coast NSW - Australia
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| Posted: Mon Apr 24, 2017 3:58 am Post subject: |
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Oldhand wrote:
The lens is performing well for you.
Certainly a surprise with its IQ.
Thanks for sharing these
T |
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Mos6502
Joined: 20 Jun 2011
Posts: 961
Location: Austin
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| Posted: Mon Apr 24, 2017 6:21 am Post subject: |
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Mos6502 wrote:
Do you have a photo of the lens itself? |
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scsambrook
Joined: 29 Mar 2009
Posts: 2167
Location: Glasgow Scotland
Expire: 2011-11-18
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| Posted: Mon Apr 24, 2017 7:24 am Post subject: |
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scsambrook wrote:
Well - you got a bargain there, that's for sure. Sometimes we (i.e. me) can be too quick to assume that the "cheap plastic" lenses are going to be mediocre - this one's pretty good by any reasonable standard for real-world photography. I think it's to be found wearing different names - somewhere I have a 1990s Vivitar SLR camera with one on it. I should look for it and give it a try.
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Stephen
Equipment: Pentax DSLR for casual shooting, Lumix G1 and Fuji XE-1 for playing with old lenses, and Leica M8 because I still like the optical rangefinder system. |
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Drosovila
Joined: 23 Jan 2017
Posts: 6
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| Posted: Mon Apr 24, 2017 10:59 am Post subject: |
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Drosovila wrote:
| Oldhand wrote: |
The lens is performing well for you.
Certainly a surprise with its IQ.
Thanks for sharing these
T |
Here's the lens itself:
On the outside its actually made of metal, but it still feels cheap and very light at 160 Gramms. |
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marcusBMG
Joined: 07 Dec 2012
Posts: 1304
Location: Conwy N Wales
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| Posted: Mon Apr 24, 2017 1:19 pm Post subject: |
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marcusBMG wrote:
Surely this is a rebadged/slightly remodelled pentax smc-m 50mm f2 ?
_________________
pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
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Drosovila
Joined: 23 Jan 2017
Posts: 6
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| Posted: Tue Apr 25, 2017 9:53 am Post subject: |
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Drosovila wrote:
Yep 99% sure theyre exactly the same lens. Thanks for the pointer. |
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Mos6502
Joined: 20 Jun 2011
Posts: 961
Location: Austin
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| Posted: Tue Apr 25, 2017 7:28 pm Post subject: |
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Mos6502 wrote:
I don't think they're the same lens. Pentax made their own lenses, beside that there's far more differences between the two than similarities. |
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D1N0
Joined: 07 Aug 2012
Posts: 2491
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| Posted: Tue Apr 25, 2017 9:01 pm Post subject: |
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D1N0 wrote:
focussing goes the wrong way around for Pentax. It's rendering reminds me of a earlier Cosinon 50mm F1.8 I have. (m42).
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pentaxian |
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