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

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  1. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks David. Yes, my original question to Zeiss was regarding the 'depth of field' at 70x zoom but I never actually found out what it was. Having given the matter some thought and also now understanding how the Harpia is working internally, I can now use the focus much better. Still struggle...
  2. S

    Harpia 95 Depth Of Field At Full Zoom.

    Hi David, I use a 30x wide angle eyepiece 95% of the time. I have a 25/75 zoom but prefer the field of view and brightness from the 30x. When zooming in with the 25/75 the field of view shrinks and darkens quite a bit. Most of my birding was moorland stuff before moving to the coast and the...
  3. S

    Harpia 95 Depth Of Field At Full Zoom.

    Cheers Ian. I'll look forward to testing it out. I've ordered an adapter ring now so should be good to go very shortly. Thanks very much for your help.
  4. S

    Harpia 95 Depth Of Field At Full Zoom.

    No, still can't .. I just get a message saying that you've chosen not to receive PMs. Did you get the email OK? PS. Let me know how much the postage is and I'll be happy to cover the cost.
  5. S

    Harpia 95 Depth Of Field At Full Zoom.

    Hi Ian, That's very kind of you and thanks very much. I'll PM you my details and will look for the correct adapter to match the case with. Edit: Ian, have just seen that your profile doesn't allow PMs so you might need to enable that part. I've sent my details via email instead.
  6. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks Ian, a very interesting read. I was saying yesterday that I need to look for a digiscoping adapter for my iPhone 5s. Zeiss do one for the Harpia but it's for the larger iPhones. I do live in Flamborough so yes, I'm very lucky that I have some great birding right on my doorstep. Thanks...
  7. S

    Harpia 95 Depth Of Field At Full Zoom.

    So ... Zeiss have been extremely helpful and have been kind enough to send me a new Harpia. The focusing is exactly the same as my old one so now I can see that the problem is entirely down to my inability to adapt to the new way of focusing as opposed to being anything wrong with the scope...
  8. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks again OhWeh, I feel that the focus wheel has a tighter feel when I turn it quickly and then when I slow down and then turn slowly, it is much looser. I presume that the tighter feel is the coarse focus and then when its easier to turn the wheel this is the fine focus. If for instance, I...
  9. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks OhWeh. Just to be sure then. Should I be able to 'pass through' both sides of the focus point with a very small (and very slow) turn of the focus wheel in either direction? Instead of having to turn the wheel (still slowly) much further to get the same result? Thanks for the reply.
  10. S

    Harpia 95 Depth Of Field At Full Zoom.

    Just to add to the mix. I had another play with the focusing on the Harpia and have noticed this: When focusing on 70x zoom, I turn the focus wheel very slowly when approaching the point of sharpness and, just as the image is starting to focus, it starts to blur again as usual. Let's say (for...
  11. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks Henry, I'll have a few tries in different conditions and see if the results are constant. I'll let you know. Thanks again. PS. I did the test at 00:30 just in case that might discount any air turbulence. I used the pole star.
  12. S

    Harpia 95 Depth Of Field At Full Zoom.

    I tried a star test last night just as a 'tester' to see if I could do it properly. First one I've ever done so I don't know whether the results were of any use or not. The star looked to be a uniformly shaped slightly fuzzy disc when I got to what appeared to be the best focus point. As I...
  13. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks very much OhWeh, I understand what you mean about the air temperature and have seen this through my scope. I did also wonder if it could be 'wobble' from my tripod which is preventing a sharp image. That said, I have used the scope in a hide with the tripod set very low so it was very...
  14. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks Henry, My friend has said that his Harpia is the best scope he's ever used so I'm hoping that when he tries mine that he will see some obvious differences between them. Zeiss have kindly offered to replace the scope with another one if there is a problem so we'll see what happens. A star...
  15. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks David, I'll let you know what the outcome is.
  16. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks Henry, I'm looking forward to testing my scope alongside the same model which a friend if mine uses. I haven't had the chance to do that yet but hopefully this itself will at least answer my question if there are obvious differences. I posted my original thread wondering if there were...
  17. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks again Joachim, I understand what you mean about atmospherics playing a big part. With that in mind I have tried the scope in the evening when the air is cooler but still have the same problem. A representative from Zeiss has been good enough to contact me to see if we are able to resolve...
  18. S

    Harpia 95 Depth Of Field At Full Zoom.

    Hi Joachim and thanks very much for your reply. It seems that the slow focus is working OK but the actual point of focus at full zoom is so miniscule that it is very easy to miss it and go too far. Even on a static object I have this problem. When I've paid over £3000 for a spotting scope it's...
  19. S

    Harpia 95 Depth Of Field At Full Zoom.

    Thanks very much Henry, I'll take a look.
  20. S

    Harpia 95 Depth Of Field At Full Zoom.

    Harpia 95 Focus Problem At Full Zoom. I've had a Zeiss Harpia 95 for a few months now but am still struggling with the focus at full zoom. The focus adjustment seems to be so 'narrow' that when turning the focus ring, just as the image looks to be sharpening, a slight extra turn of the focus...
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