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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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 Posted: Wed Dec 06, 2017 9:23 am Post subject: Kipon adapter => internal reflections? |
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Since Sony has a silent mode, I purchased a Sony a6300 for the sole purpose of focus stacking. The shop recommended to get a Kipon adapter from Sony NEX to Canon EF. The adapter arrived today, I picked it up and haven't used it yet.
I have the idea of glueing in a UV filter adapter ring so I can attach a (high quality B+W) UV filter to that ring to seal the camera sensor from dust (see picture). Dust is often an issue with my stacks and preventing it is much better than having to retouch it.
My first impression is that the surface of the adapter is quite shiny and would possibly give internal refectlions and loss of contrast.
I'd like to hear your thoughts and opinions here 
Niels
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ray_parkhurst
Joined: 20 Nov 2010
Posts: 1638
Location: Santa Clara, CA, USA
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| Posted: Wed Dec 06, 2017 9:25 am Post subject: |
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| Looks shiny to me. Protostar or doodlebug or equivalent will fix that right up. |
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ChrisR
Site Admin
Joined: 14 Mar 2009
Posts: 7829
Location: Near London, UK
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| Posted: Wed Dec 06, 2017 9:40 am Post subject: |
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It might be easy to paint black, The one mentioned last ( "Black2"? ) is pretty good, and easier to get than Protostar or Doodlebug.
Last time I looked, Hoya beat B&W.
I wonder if it would be better to angle the filter, to prevent reflections to/fromm sensor or lens. If angled just slightly, I expect you'd see a line of some sort, perpendiculat to the tilt axis, if refelections are occurring.
I expect you're aware that there are filters which fit camera mouths, available for astro photography, including clear ones. I assume they're particularly thin.
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 9:41 am Post subject: |
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| ray_parkhurst wrote: | | Looks shiny to me. Protostar or doodlebug or equivalent will fix that right up. |
what are protostar and doodlebug other than a very young star and a movie from 1997?  |
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 9:43 am Post subject: |
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| ChrisR wrote: | It might be easy to paint black, The one mentioned last ( "Black2"? ) is pretty good, and easier to get than Protostar or Doodlebug.
Last time I looked, Hoya beat B&W.
I wonder if it would be better to angle the filter, to prevent reflections to/fromm sensor or lens. If angled just slightly, I expect you'd see a line of some sort, perpendiculat to the tilt axis, if refelections are occurring.
I expect you're aware that there are filters which fit camera mouths, available for astro photography, including clear ones. I assume they're particularly thin. |
I have one that fits in the Canon APS-C mount, but it doesn't seal completely. If clicks in place but is by no means air tight and therefore useless for blocking dust particles.
I once bought a can of this black paint together with a small package of cristobalite (SiO2) powder. The people from the store said it would remove even more reflections from that black paint, but no clue how black it is compared to black 2.0. Since the adapter is about 100 usd I don't want to mess it up with the wrong paint so I prefer to do it proper the first time.
I made a phone call to a local art shop and they don't have black 2.0, but they do have molotow tar black ral 210 in a spray can. |
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rjlittlefield
Site Admin
Joined: 01 Aug 2006
Posts: 19244
Location: Richland, Washington State, USA
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 11:19 am Post subject: |
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I have some black flocking (not sure which one), but never used it (never needed to use it). Also I'm afraid it gives of fibers and/or dust particles. |
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ray_parkhurst
Joined: 20 Nov 2010
Posts: 1638
Location: Santa Clara, CA, USA
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| Posted: Wed Dec 06, 2017 11:49 am Post subject: |
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| nielsgeode wrote: |
I have some black flocking (not sure which one), but never used it (never needed to use it). Also I'm afraid it gives of fibers and/or dust particles. |
I've had good luck with black construction paper. |
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 11:49 am Post subject: |
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I see I can order a bottle of BLACK 2.0 from culturehustle.com for about 30 USD including shipping.
Are there people on the forum that have experience with BLACK 2.0? How durable is it and how big is the risk of paint particles getting on lens surfaces or inside lenses or bellows etc.? |
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RobertOToole
Joined: 17 Jan 2013
Posts: 914
Location: United States
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| Posted: Wed Dec 06, 2017 11:51 am Post subject: |
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| nielsgeode wrote: |
I have some black flocking (not sure which one), but never used it (never needed to use it). Also I'm afraid it gives of fibers and/or dust particles. |
Hi
Last month I picked up a Sony A6300 and all of my adapters needed flocking to cut central flare. Once fixed they now work fine.
I have a 250 foot or 76 meter roll of Prostar flocking material, thats a little more than I need. Message me your address and I can send you some in an envelope first class mail.
Robert |
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 12:04 pm Post subject: |
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| RobertOToole wrote: | | nielsgeode wrote: |
I have some black flocking (not sure which one), but never used it (never needed to use it). Also I'm afraid it gives of fibers and/or dust particles. |
Hi
Last month I picked up a Sony A6300 and all of my adapters needed flocking to cut central flare. Once fixed they now work fine.
I have a 250 foot or 76 meter roll of Prostar flocking material, thats a little more than I need. Message me your address and I can send you some in an envelope first class mail.
Robert |
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enricosavazzi
Joined: 21 Nov 2009
Posts: 1068
Location: Stockholm, Sweden
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| Posted: Wed Dec 06, 2017 12:59 pm Post subject: |
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In general, lens adapters from Metabones are among the best currently available (including mechanical tolerances, chromed brass or steel rear bayonets and internal blackening). If you are contemplating purchasing a new adapter, this is what I recommend. However, Metabones adapters cost roughly 2 to 8 times more than competitors.
Kipon adapters are cheaper and clearly more cheaply made, but still somewhat better than many no-name ones. Unless you are not satisfied with mechanical tolerances of your Kipon adapter, you could try lining the interior with protostar or painting it with flat black as suggested by others, before looking at Metabones adapters.
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Wed Dec 06, 2017 1:16 pm Post subject: |
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| enricosavazzi wrote: | In general, lens adapters from Metabones are among the best currently available (including mechanical tolerances, chromed brass or steel rear bayonets and internal blackening). If you are contemplating purchasing a new adapter, this is what I recommend. However, Metabones adapters cost roughly 2 to 8 times more than competitors.
Kipon adapters are cheaper and clearly more cheaply made, but still somewhat better than many no-name ones. Unless you are not satisfied with mechanical tolerances of your Kipon adapter, you could try lining the interior with protostar or painting it with flat black as suggested by others, before looking at Metabones adapters. |
Metabones would be overkill in terms of functionality, electronics and autofocus because I literally only use it for focus stacking with microscope objectives. Hence I have a Kipon adapter that is mehanical-fit only with no electronics whatsoever. Another very good company is Novoflex of course, but haven't looked into them.
Concerning the mechanical fit of the Kipon: I have no idea because I haven't tested it (just picked it up today from the shop)
Edit: just mounted a Canon 200mm f/2.8L II on the A6300 with the kipon adapter and it doesn't wobble, there's a tight fit with only the camera and lens being able to rotate a little bit around the mount of the adapter. Personally, I don't really mind. |
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Yawns
Joined: 20 Dec 2015
Posts: 153
Location: Portugal
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nielsgeode
Joined: 31 Jul 2012
Posts: 251
Location: Groningen, Netherlands
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| Posted: Sat Dec 09, 2017 1:20 am Post subject: |
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The adapter ring to which a dust seal (i.e. UV filter) will be screwed has been glued to the KIPON adapter with epoxy. On the side of the Sony mount is a thin line of gray-colored epoxy.
Would it impact contrast in the images and how would you make it black? I'm not to keen on using protostar or similar because I'm afraid it gives off fibers and then there's nothing between the protostar and the sensor.
I was thinking to take a very small brush and paint it black with this stuff that I have page is in German. It translates as matt blackboard paint. Would it attach to the anodized aluminum and to the epoxy and wouldn't it give off any particles or vapor in the long term? Of course you let it dry completely first.
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