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

Recent content by gwing

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    benro gh2 gimbal

    I'm using a cheap Chinese knockoff that looks exactly like the Benro gh2 and is/was available on ebay for £70 or so. Generally it has a picture of a hiker on the tripod boss and a silly little compass attached as well. Whether it actually is the same manufacture as the Benro I don't know. In...
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    Which Pentax for a manual lens/scope??

    Go for the KX Hi, The KX would I think be an excellent choice for an Astro scope having a very good low light/high iso sensor, even better for that purpose than the more upmarket K7 I use. Specifically for your questions it meters fine with manual lenses of all types, of these you will find...
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    Lens Reversing

    I don't think this is generally a problem (at least not on any of my Pentax lenses, which are all auto aperture). If they are not mounted on a camera they are always at set aperture rather than fully open. I should also add it's not necessary to stick to fifties. When I used to do this stuff...
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    TAMRON SP 200-500mm F5.6. model 31A

    This particular lens is already firmly attached to my Pentax and not coming off so the mirrorless boys will have to do without :-) I must say I'm delighted with the lens and impressed with the test shot's I've been able to take. What you need most for a lens like this is of course good light -...
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    Pentax 560mm f5.6 announced

    It does look as if that might be the case and there has been considerable speculation about that on the Pentax forums, it certainly would be an interesting eature. When asked on the subject all the Pentax spokesman would say was 'the design is not yet finalised and may change' so we'll have to...
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    Pentax 560mm f5.6 announced

    Yes it is exciting times. After years of nothing we had the 200 and 300 arrive. Now there is the 550 and a 120-380 zoom as well, specs are thin on that but it might be a good option for BIF if we are lucky.
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    Old non AF lenses on K200

    Which, for birding, has become my preferred way of working even with 'A' of 'F' lenses. Just love those old lenses :eat:
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    Red Kites in the Chilterns

    Chesham You'll be pretty unlucky to spend long in our garden without seeing one, a couple of young ones also come down from time to time for food :-) There are plenty around here in Chesham and along the ridges to the North and West,
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    Magnification and Zoom

    I don't know this (or even use this type) of camera but yes I think you are interpreting the spec correctly. It should have a max optical magnification of 17x or 68x with digital zoom at max as well. Don't get excited about that though as the digital zoom will give you nothing you can't do by...
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    Magnification and Zoom

    Not necessarily 10x, that was just an example. If a zoom is stated as 20x that should just mean the range between highest and lowest manification is a 20:1 ratio ie if the widest angle is 0.5x magnification the highest magnification will be 10x, yet if the widest angle is 0.25x mag the highest...
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    Molar Bean Bags - UK source

    Nice bit of cottage industry Or you could take a look at: http://camerabeanbags.co.uk/ Rather better designed and constructed than the old one I made myself back in the day :-)
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    DSLR Digiscoping

    The fast aperture isn't going to happen with a spotting scope or probably anything even vaguely portable. As has been said there is no magic and a 100mm scope set up for 800mm is going to be f8 at best however you do it, usable but hardly fast. Generally true but a bit sweeping. For instance...
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    online printing

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    night photos

    Make sure it isn't being caused by light entering through the viewfinder. To test take a shot with lenscap on and the viewfinder covered and/or in a black room to check if you still get red coming from the edges. In general when shooting on a tripod with the eye not covering the viewfinder it...
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    online printing

    DSC colour labs I've been very impressed with DSC colour labs [URL="http://www.dscolourlabs.co.uk"] Note that I can only speak for their 'professional' service - which isn't more expensive but for which you supply profiled and pre-sized files rather than leaving the adjustments up to them...
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