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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. C

    Nikon V1 and prime focus

    It's a very interesting setup, specially at that price! These evil cameras could be the future for digiscoping, their specs are very close to what we asked for when looking for a proper compact camera for digiscoping: bigger sensor, less noise, more dinamic range, no mirror to deal with, manual...
  2. C

    Astroscope + eyepiece + compact camera - Setup

    Dan, it could work. With your scope, a 32mm eyepiece, a 35mm macro lens and your M4/3 you'll have: EFL = 600 / 32 * 2 * 35 = 1312 mm of equivalent focal length That lense in your camera will work like a 70mm equivalent lense, so if you could attach it at the proper distance from the eyepiece...
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    Astroscope + eyepiece + compact camera - Setup

    Yes, I meant shutter speed. When you send all the light collected from the aperture to that small sensor (coupling afocally) you get much quicker shutter speed operation. Situation goes even worse when you use teleconverters in your prime focus setup, of course. Despite of the evident...
  4. C

    Astroscope + eyepiece + compact camera - Setup

    Hi Dan. I also use prime focus with different barlows and powermates with the Televue 76 and a Canon 1000D. After learning how to conveniently baffle them (thanks to the much appreciate help of Paul Corfield) results are also good with my 2x GSO 2'' and my Powermate 2.5x. But with an APS-C...
  5. C

    Astroscope + eyepiece + compact camera - Setup

    Finally, two more that are processed with PS, some color, exposure and noise improvements. For web publishing sizes the extra processing is not very important. The rate of good photos with this setup is very high, feeling almost the same that with the standalone P&S camera. I use the compact...
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    Astroscope + eyepiece + compact camera - Setup

    Same session, some other pictures only cropped and scaled down with IrfanView, FL between 1700mm and 2400mm.
  7. C

    Astroscope + eyepiece + compact camera - Setup

    Some other pictures from another session; some of them are cropped, and they are only scaled down with IrfanView (no photoshop or other advanced processing). The frog is a crop shooted at 3900mm of equivalent focal length. Others are shooted between 1500mm and 2700mm FL.
  8. C

    Astroscope + eyepiece + compact camera - Setup

    ISO100, 1/250s, F5.6, 1520mm of equivalent focal length. Again a real pixel crop from the original jpeg captured from the compact camera.
  9. C

    Astroscope + eyepiece + compact camera - Setup

    Feather detail Hi, About feather detail here you have some real pixels crops from the Sony W7 7mpx camera with this setup. Pictures are directly cropped from original pictures, with no kind of post processing, neither sharpening or any other kind of improvement. With slight post processing...
  10. C

    Actual focal length

    Other source of little errors is crop factor. For example, APS-C sensors from Canon are rated as 1.6x, but there are some small differences between the real size of each one. For example my Canon 1000D has a 22.2mm width sensor, giving a 1,622x crop factor (+1,4% from the supossed 1.6x). But...
  11. C

    Astroscope + DSLR = Gallery!

    Paul I don't find your definition a simple one. You assert that the only definition of digiscoping is: "A scope that incorprorates a prism and eyepiece and photographing through it using a camera that has a lens attached" In my years of "digiscoping" I have "digiscoped" through the next...
  12. C

    Actual focal length

    Computing actual focal length The actual focal length when you focus near objetcs is a bit longer that the featured in specs, which is computed focusing to infinity. When the focused area is near the scope, the focal plane goes backwards and the effective focal length increases a bit. The...
  13. C

    Astroscope + DSLR = Gallery!

    Paul, with your knowledge and adding some pieces I'm sure that you could convert your scope even in a microscope, but it will remain being a scope. Glass is glass, and optic laws are the same for all of them, so you can use devices for different purposes for what they were in fact intended, but...
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    Astroscope + DSLR = Gallery!

    Hyrax, nice shoots all of them, each one having a special charm
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    Astroscope + DSLR = Gallery!

    Everyone has its own opinion, but I simply think that if you use a scope as a part of your photographic system, you are digiscoping. For example, I frequently use an astro scope, but with eyepiece and a compact camera. Other times I work with prime focus... despite of the big differences...
  16. C

    Tripod Mount ??'s + Alternatives to No Lens Prime w/Astro-Scope

    Hello Dan, I disagree with you about not getting any quality return from using a good head... if you try a fluid video head you'll know what I mean. Long focal photography is much sensitive to any case of shakening, and reducing them will lead to a significative improvement in your IQ. Or at...
  17. C

    Astroscope + eyepiece + compact camera - Setup

    Same day, from the car, I saw this Streaked Fantail Warbler, and it was so small that I had to use full zoom, 3900mm of total focal length plus cropping. ISO100, F5.2, 1/160s. With practice I learnt that 1/160s is not enough speed to shot from inside the car with 3900mm of focal length, and...
  18. C

    Astroscope + eyepiece + compact camera - Setup

    First pictures with that setup At first I used a PVC pipes hand made adapter for straight connecting the eyepiece to the scope, and to hold the camera. It was not tight enough to absolutely control tilting, but results where not bad. Actually with the 2'' extension tubes and the threaded ring...
  19. C

    Astroscope + eyepiece + compact camera - Setup

    Some old pictures Thanks Dan, well I've no recent pictures with this setup, so I am going to upload some old photos. I've lost the original pictures of many of them, but they looked pretty good at high resolution. Here you have a flamingo just after intercourse, from about 70 meters. Televue...
  20. C

    Autofocus with a telescope

    It seems that it is usual to find the Nikon TC16A already modified in ebay (there are some of them just now). Pentax and Nikon use a teleconverter layout to achieve autofocus whith those products, moving internally the lenses to focus the projected plane at different distances. So the 1.6x or...
  21. C

    Autofocus with a telescope

    Oh my god, until I've seen how does the Pentax 1.7x AF TC work I didn't understand anything. It is very interesting, but I don't know why that japanese guy is using such a small diameter objective that produces so much vignetting. Well, in fact it seems that he uses it because of the long...
  22. C

    SV 80mm APO to Lumix G3 Prism Question - Any Takers?

    SeattleDan, congratulations for your buy. It seems to be a great scope, for sure optically better than my TV76 so... it has to be breathtaking to see through it with a quality eyepiece. With the G3 it must be a killer mix for daytime photography. Please search information in this forum about...
  23. C

    Astroscope + DSLR = Gallery!

    Hey cango, what a marvelous pictures! The little Oly seems to perform really well, at least in your hands. I love the light of your pictures, which are plenty of detail and texture, great photos with a very natural thus sharp focus. I like specially the Bearded Reedling, because it is the first...
  24. C

    Astroscope + DSLR = Gallery!

    All of them at prime focus with the Canon 1000D coupled to the Televue 76. Hidden with a camouflage net.
  25. C

    Astroscope + DSLR = Gallery!

    Huge forest fire Yesterday evening we saw a big forest fire beginning just at my beloved "Barranco Blanco" place. It seemed to be a big fire, but the hot weather and strong winds have converted it in a really huge one. It is still firing and have extended over a broad area, from Coin to...
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