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robert_deas3

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Everything posted by robert_deas3

  1. <p>@Richard re prices, I am seeing genuine Hasselblad split prism screens really scratched and looking as though they were dragged behind a truck at $30, brand new Chinese ones $20-$50, and the Acute-Matte screens for ten times as much.</p>
  2. <p>Yes it will give you more magnification. The further you move the lens from the camera, the higher the effective magnification when the image is focussed.<br> <br /> The practical considerations as you take this to an extreme are <br /> 1) the image gets darker and darker<br /> 2) the depth of field becomes extremely shallow<br /> 3) it becomes very difficult indeed to keep everything motionless enough: the slightest environmental vibration will blur the subject, camera shake becomes really hard to avoid.</p> <p>I had great fun experimenting with macro - here's something else you could try instead of lots of extension tubes: reverse a wide-angle lens. I rigged up a home-made mounting for a beautiful old Minolta Rokkor 24mm lens (that it was designed for use on a 35mm camera doesn't matter when it's reversed) mounted backwards on a Mamiya 645 body and it gave very high magnification and outstanding image quality.</p>
  3. <p>I'm not concerned about brightness, I just want a split-prism. I can easily imagine that they could be made cheaply, it's just ground glass, none of the technical sophistication of the Acute-Matte and other bright screens.<br> I would buy a Haselblad original, I just can't find one at a sensible price in good condition.<br> I am aware of the Kiev stuff and use a couple of their prisms, as one poster mentions these seem perfectly matched to Hasselblad bodies. I can only see one Kiev split focussing screen for sale at present and it is the screen itself alone, without the metal frame with its four little feet that hold the screen at the right position. I'm perfectly happy to trust Soviet engineering, just not so sure about Chinese!</p>
  4. <p>Hi, I am finding my original cross-hair focussing screen hard to use in critical situations but I haven't been able to find a genuine Hasselblad split screen in good condition that I can afford, and so I'm considering the Chinese-made copies on eBay at around £20.<br /> Obviously it's critical for focussing that the screen is mounted at exactly the right distance from the mirror, so the thing needs to be accurately made, and naturally this is something I am concerned about<br /> There are a couple of previous threads in which people have bought one and promised to report back (in 2010) but never did. Has anyone genuine experience of using them who can vouch for their accuracy of construction? They all appear to be from the same source, the photographs from all the sellers show the same box when it is included.</p>
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