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alex ph
Joined: 16 Mar 2013
Posts: 1571
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 Posted: Tue Mar 30, 2021 8:11 pm Post subject: Accura 5/300, not bad at all |
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alex ph wrote:
Today a postman brought to me a heavy packet with an Accura 5/500. There is an Accura Diamatic of the same focal length, made by Sankor. Mine is not definitely the one. It does not have "Diamatic" or another added name, the serial number does not include "E", and the lens' design looks more modern, both the barrel and a blue multicoating of the front glass. MFD is a long 4.5m.
The lens renders really well from WO, at least as for sharpness. It also gives quite visible purple fringing at all apertures, under strong sunbeams. And its general IQ lets me think of Tokina which may have produced the lens. At least, its sharp, colourful rendering with strong CAs gets my memory pop up an experience with a Tokina 2.8/135.
Here are some samples at f5 and f5.6, with autocontrast applied and taken with Sony Nex, making its focal close to 450mm.
#1 Wide open
#2 Wide open
#3 f5.6
Here is a shot at infinity, with the aperture progressively closed down. At f16 the diffraction gets slightly visible. In-forum images look softer than thoses clicked.
#4 At f5
#5 At f5.6
#6 At f8
#7 At f11
#8 At f16
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alex ph
Joined: 16 Mar 2013
Posts: 1571
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| Posted: Fri Apr 02, 2021 6:29 pm Post subject: |
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alex ph wrote:
Out of harsh sun beams the lens does not give that strong purple fringing. So even more usable, especially given its low price even in ebay BIN listings.
Both ones wide open, with Sony Nex
#1
#2
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Phalbert
Joined: 17 May 2009
Posts: 359
Location: Namibia
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| Posted: Sat Apr 03, 2021 10:34 am Post subject: |
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Phalbert wrote:
Nice. Do you have a pic if the lens ? Your #4 might be out of focus ? The small chimneys in the background look sharper than the front ones .
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marcusBMG
Joined: 07 Dec 2012
Posts: 1304
Location: Conwy N Wales
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| Posted: Sat Apr 03, 2021 1:03 pm Post subject: |
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marcusBMG wrote:
Like one of these?
https://www.pentaxforums.com/userreviews/photax-paragon-promura-kaligar-300mm-f5.html
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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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alex ph
Joined: 16 Mar 2013
Posts: 1571
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| Posted: Sat Apr 03, 2021 8:01 pm Post subject: |
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alex ph wrote:
| Phalbert wrote: |
| Your #4 might be out of focus ? The small chimneys in the background look sharper than the front ones. |
After you said that I looked more attentively ath the shot and admit you must be right. It is not a fall of performance in the corners, just the focusing.
Here is a shot of the lens I borrowed from ebay listings, as the light is too poor for a better picture of my copy.
Marcus, the versions you refer to look pretty much the same. |
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