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Poolhall
Joined: 25 Feb 2008
Posts: 1296
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 Posted: Tue Mar 16, 2010 4:39 pm Post subject: ZM-5A 500mm Mirror Lens |
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Poolhall wrote:
Great Crested Grebe
Grey Heron
Taken this afternoon on my usual walk  |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Mar 16, 2010 5:17 pm Post subject: |
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Attila wrote:
Need some PS to remove nasty gray, not bad at all from an 500mm (handheld) lens.
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Poolhall
Joined: 25 Feb 2008
Posts: 1296
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| Posted: Tue Mar 16, 2010 6:48 pm Post subject: |
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Poolhall wrote:
Yes its ok for handheld you can get some good results with the lens but focusing can be tricky, as for the' nasty gray' Attila do you mean the bird or the sky? |
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martinsmith99
Joined: 31 Aug 2008
Posts: 6950
Location: S Glos, UK
Expire: 2013-11-18
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| Posted: Tue Mar 16, 2010 7:31 pm Post subject: |
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martinsmith99 wrote:
Looks like a sharp lens!
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
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| Posted: Tue Mar 16, 2010 9:34 pm Post subject: |
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Attila wrote:
| Poolhall wrote: |
| Yes its ok for handheld you can get some good results with the lens but focusing can be tricky, as for the' nasty gray' Attila do you mean the bird or the sky? |
 )) sky of course.
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Poolhall
Joined: 25 Feb 2008
Posts: 1296
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| Posted: Tue Mar 16, 2010 10:21 pm Post subject: |
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Poolhall wrote:
Maybe like this..
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Himself
Joined: 01 Mar 2007
Posts: 3245
Location: Montreal
Expire: 2013-05-30
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| Posted: Wed Mar 17, 2010 12:24 am Post subject: |
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Himself wrote:
It doesn't look sharp to me.
Try not to strip the EXIF, I wanted to see the shutter speed. |
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SkedAddled
Joined: 19 Oct 2008
Posts: 1443
Location: Michigan, USA
Expire: 2021-08-12
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| Posted: Wed Mar 17, 2010 6:14 am Post subject: |
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SkedAddled wrote:
Focus in #1 appears to be slightly past the bird, as the wave beyond
seems sharper to me.
Focus in #2 seems generally soft to me. Nothing else in the shot for reference.
Perhaps this is a limitation of the lens or lens type - ?
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Poolhall
Joined: 25 Feb 2008
Posts: 1296
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| Posted: Wed Mar 17, 2010 8:52 am Post subject: |
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Poolhall wrote:
Limitation of the lens I think for focus- mirrors can be very hard to get absolutely spot on, so they tend to use depth of field in the design to cover this a little. Also this lens is mounted on the smallest of my m42 extension tubes to clear the flash mounting on the camera, the lens can focus beyond infinity to compensate for this. This feature is also part of the design to allow, I believe, for movement in the mirrors due to temperature change. As for the exif it was fs viewer that stripped it as part of the raw conversion process, the iso was 400 aperture fixed at f8 and the speed was 1/1500, shot taken in av mode. |
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