Close-up lens on Hasselblad HC lens
Dec 22, 2019 19:49:44 #
I have a Hasselblad H2 camera with HC lenses. I got a used 26mm extension tube, but it would not work. I tried a #2 close-up lens on 80mm lens and 150mm lens, and that did not focus through the magnifier. I assume there is something wrong with the extension, but shouldn't the autofocus work through the #2?
Dec 22, 2019 20:25:47 #
wdross
Loc: Castle Rock, Colorado
Charles 46277 wrote:
I have a Hasselblad H2 camera with HC lenses. I got a used 26mm extension tube, but it would not work. I tried a #2 close-up lens on 80mm lens and 150mm lens, and that did not focus through the magnifier. I assume there is something wrong with the extension, but shouldn't the autofocus work through the #2?
The older film Hasselblads had a quirk that tubes had to be mounted to the body before the lens could be mounted to the tube. And then it all had to be taken apart in reverse order. Is it possible the HC series operates the same?
Dec 22, 2019 20:57:32 #
Dioptre lenses do not affect function.
There is user error there. The tube
OTOH could be defective.
There is user error there. The tube
OTOH could be defective.
Dec 23, 2019 11:10:16 #
fetzler
Loc: North West PA
Close up lenses are usually rather bad. You might consider Raynox lenses. Medium Format macro is real challenge. Close up lenses shift focus to closer distances but otherwise should not affect camera function.
Dec 23, 2019 17:29:32 #
Don't try to focus, or auto focus, when you're using the closeup 'filter.' Attach the filter, set the lens' focus to infinity, then move the entire camera toward the subject until it is in focus, then set the lens' focus to minimum focus distance and move closer again, until the subject is in focus. This will give you an idea of maximum & minimum focus distances with the closeup 'filter.' Good luck.
Dec 25, 2019 13:15:24 #
amfoto1
Loc: San Jose, Calif. USA
fetzler wrote:
...You might consider Raynox lenses.....
Canon 500D and 250D are also top quality close-up "diopters".
The 500D is the weaker of the two, is recommended for use on 70mm to 300mm lenses (on full frame/35mm film and APS-C) and comes in 52mm, 58mm, 72mm and 77mm diameters.
The 250D is the stronger of the two, is recommended for lenses 30mm to 135mm (FF/35mm film and APS-C) and only comes in 52mm and 58mm diameters.
Step rings might be used for lenses with other sizes of filter threads.
I have heard that the "500" in 500D is the distance in millimeters that infinity on certain lenses will be limited to.
The same with the "250" in 250D, which is why it's considered the stronger of the two diopters.
I haven't used, but have heard good things about some Raynox, too.
Dec 25, 2019 18:07:23 #
Dec 25, 2019 20:18:34 #
twowindsbear wrote:
Don't try to focus, or auto focus, when you're using the closeup 'filter.' Attach the filter, set the lens' focus to infinity, then move the entire camera toward the subject until it is in focus, then set the lens' focus to minimum focus distance and move closer again, until the subject is in focus. This will give you an idea of maximum & minimum focus distances with the closeup 'filter.' Good luck.
OK--when I determine the range near and far for a supplemental lens (which can be significant for a tele lens), and the subject is in that range, would the autofocus work in that case? Or is it always manual by way of moving the camera? (If the subject is between the near and far limits, does the manual focus work?) I am trying to determine if the problem is in the equipment or the function.
Dec 25, 2019 22:10:34 #
Charles 46277 wrote:
OK--when I determine the range near and far for a supplemental lens (which can be significant for a tele lens), and the subject is in that range, would the autofocus work in that case? Or is it always manual by way of moving the camera? (If the subject is between the near and far limits, does the manual focus work?) I am trying to determine if the problem is in the equipment or the function.
Well, my limited experience using a close up filter both AF and MF worked equally well. Keep in mind that your DOF will be quite narrow at these close distances.
Should be considering true macro magnification ranges, I've found it a LOT easier to set a distance on the lens and then move the entire assembly until the subject is in focus, with AF turned off.
Dec 26, 2019 09:47:11 #
twowindsbear wrote:
Well, my limited experience using a close up filter both AF and MF worked equally well. Keep in mind that your DOF will be quite narrow at these close distances.
Should be considering true macro magnification ranges, I've found it a LOT easier to set a distance on the lens and then move the entire assembly until the subject is in focus, with AF turned off.
Should be considering true macro magnification ranges, I've found it a LOT easier to set a distance on the lens and then move the entire assembly until the subject is in focus, with AF turned off.
Yes, and most macro is on a tripod--but in case I do need a close shot handheld, autofocus would be good. With a 150mm lens there will be wiggle room for focus vis a vis distance, so if I am ballpark close the auto could handle it better than trying to hold it just right. Obviously the 120mm-macro lens would be ideal, but I am unlikely to buy 120mm when I have both 80mm and 150mm already. The 150mm is already into macro for a head shot (but it works fine--just--for normal portrait distances), and autofocus would be good in that case.
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