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Forum: General Talk
11-30-2016, 02:32 PM
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A dual speed (1:10) Crayford focuser it is.
Indeed; I should even say that with his tiny field of view, a tripod head with SLOW!!! altitude-azimuth movement fine controls is a must for any decently accurate framing. So, I also had to buy this in Japan via eBay:
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My TSED70Q Astrograph on a Kenko New KDS Alt-Az Mount.
Just finding one's object at such FOVs can be a real pain, so I further had to invest in a laser green dot rifle sight
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No-name (Chinese) Laser Green Dot Rifle Sight as finder 'scope' for my TSED70Q
Yes, amateur photography, and not the least amateur astro photography, is serious (= costly) business. And now I have to start all over again saving for that 08 Wide Zoom lens for my Pentax Qs.........
Woha - that obliges! Thank you very much wolfiegirl.
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Forum: General Talk
11-29-2016, 04:01 PM
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Hmmm.......let's see: Length with dew cap retracted = 310mm; weight = 2.5 kg. On reflection, I tend to believe that you may have a point here.
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Forum: General Talk
11-29-2016, 03:26 PM
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Got myself a nifty little lens to be shared between my Astro-Macro Pentax Q10 and my Walk-Around Pentax Q-S1:
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TS Imaging Star Astrograph TSED70Q (Ø = 70mm; FL = 474mm; f = 6.78) on Pentax Q-S1 |
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Forum: General Talk
09-30-2016, 03:06 PM
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Decided to buy a Pentax Q-S1 to complement my Q10 "while supplies last" and found a used one, which I took delivery of yesterday, with just 919 clicks on German eBay
And speaking about Tamron Adaptall-2 SP 80-200mm / f2.8 Model 30A,
Congrats to csa with your purchase! You got a zoom with prime-like qualities; now then, here is a picture of my 'new' Q-S1 on my old Model 30A:
This is camera-mounted-on-lens rather than lens-mounted-on-camera, isn't it?
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Forum: General Talk
12-16-2015, 03:38 PM
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Samyang 14mm F2.8 ED AS IF UMC for Pentax K
- now, could I please, please have some clear, starry skies (which I haven't had for about 3 months now)!
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Forum: General Talk
07-08-2014, 02:24 PM
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Thanks Jean,
Well, I use the eyepiece to project the image formed by a lens or telescope over some (variable) distance to my camera, resulting in a significant magnification - at the cost of increasing the f-number correspondingly. The reason for hunting down an old orthoscopic type is that these have an extremely flat and undistorted field of view with virtually no chromatric aberration. They have gone out of fashion because they have a rather narrow apparent field of view of about 45 degrees and rather short eye-relief, but they should be good for photography because of the virtues mentioned. Some applications:
Extreme Macro - Extreme Macro Using Eyepiece Projection
Lunar and planetary photography - Camera Settings for Astrophotography |
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Forum: General Talk
07-08-2014, 02:03 PM
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A genuine, vintage Circle-T orthoscopic 7mm eyepiece
From the good old days, where such items were assembeled by elderly Japanese craftsmen
and each item came with a quality control label of their own
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And now out for some eyepiece projection photography.
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Forum: General Talk
04-13-2013, 04:11 PM
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This Wednesday arrived something I have dreamed about since I was allowed to try it out on my own K-5 at a local photo fair last year, (thanks for showing up Pentax):
smc PENTAX-DA* 1:2.8 200mm ED (IF) SDM - long name for a rather heavy but well balanced and wonderful lens.
Next on order is some clear skies so that I can try it out for astrophotography.
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