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#1
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Hassy 250mm + tube.... which?
I recall someone mentioning the 250mm plus tube is good for tight head
shots. Which tube is recommended? (BTW, i'm a bit excited- might be getting a 50mm and 250mm- older black CT* type for the combined price of £150... woohoo!) -- - Martin Francis "Two hundred channels, and nothing but cats" - Jasper |
#2
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Hassy 250mm + tube.... which?
Martin Francis wrote:
I recall someone mentioning the 250mm plus tube is good for tight head shots. Which tube is recommended? 32 mm. It almost perfectly matches the lens' own built-in extension, providing an almost seemless focussing range from infinity to quite close (minimum field of view approx. 22 cm, or 8.5" square) . The minimum field of view of the 250 mm lens without tube is approx. 45 cm, or 18". Remember that the 250 mm lens fully extended, without use of any tube or bellows, already needs 0.6 stop extra exposure. In combination with the 32 mm tube, the exposure combination needed ranges from that (0.6 stop) to 1 full stop, depending on amount of lens extension used. (BTW, i'm a bit excited- might be getting a 50mm and 250mm- older black CT* type for the combined price of £150... woohoo!) That's not bad, no ;-) |
#3
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Hassy 250mm + tube.... which?
"Q.G. de Bakker" wrote:
Martin Francis wrote: I recall someone mentioning the 250mm plus tube is good for tight head shots. Which tube is recommended? 32 mm. It almost perfectly matches the lens' own built-in extension, providing an almost seemless focussing range from infinity to quite close (minimum field of view approx. 22 cm, or 8.5" square) . The minimum field of view of the 250 mm lens without tube is approx. 45 cm, or 18". Remember that the 250 mm lens fully extended, without use of any tube or bellows, already needs 0.6 stop extra exposure. In combination with the 32 mm tube, the exposure combination needed ranges from that (0.6 stop) to 1 full stop, depending on amount of lens extension used. Agree with Q.G. I have the 21 and 55 tubes, and neither is just right with the 250 lens, somewhere in the middle would be perfect. The 150 + 21 is ideal. --- David Meiland Friday Harbor, WA http://davidmeiland.com/ **Check the reply address before sending mail |
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