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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Phil, No problem on the patience front. Understanding binoculars and resolution is a learning process, and I for one am still learning more, including during the testing done during the short life of this present thread. For instance, inspired by the unexpectedly good results with the 8x20... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Phil, I tend to stand when doing tripod-mounted tests. Mostly I keep my face from touching the binocular, but it depends on what seems to give the best view. With the scope, usually my brow is touching the eyecup, since the one on the ATX is so large that it is almost unavoidable. But the scope... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
David, Pardon me for being nosy, but is your prescription for myopia or presbyopia? Kimmo -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Phil, Thanks for your kind words concerning my reviews. I know they are not everybody's cup of tea, but back when I started I felt that there were no well-conducted reviews available, and so the solution was to do them oneself. There had been one fellow doing really good reviews in the eighties... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Henry, I'm not worrying about the Ultravid as a binocular, I've seen enough binoculars to know that it is as sharp as any 20mm binocular is ever going to be. My concern really has only been about finding an explanation for the resolution figure relative to aperture that is better than in any... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Henry, Thanks for this. It maybe does not quite save the credibility of my observations yet, but would seem to go some ways towards that. Could you get that with the 22mm also, or just with the 24mm? I took the Leica 8x20 to the store today and looked at some glitter points through it. They... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Henry, Just to be sure, I measured the true aperture of the Leica 8x20 Ultravid with the card obstruction method, but it turned out to be just the 20mm it is supposed to be. The thought had occurred to me that if it happened to be, say, 22mm that would help explain the boosted resolution... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Phil, This head movement issue is familiar to me also, but I have done so much of tripod-mounted binocular testing over the years that I am rather used to it have learned to keep my head rather still. My guess is that firstly it is harder to keep two eyes aligned with exit pupils than one, and... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
David, I don't think anything that weird is happening. The image looks exactly like what an excellent-quality resolution target should look like, when viewed with really good optics with diffraction limiting their performance. The only anomaly is that according to conventional optics wisdom it... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
I re-tested the Ultravid 8x20 now. Not fussing with absolute limits, rather attempting to be even more careful and conservative than usual. Essentially, this duplicated the earlier results. First, I re-measured the distances to the target, and reassuringly found my reference points to be... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Henry, This looks better than the USAF, and goes down to USAF equivalent 4,2. What I have is the #38257 2x2" USAF, that starts from 0,1 and goes down to group 7. It seems to cost 160 dollars today. It is worth it, though, especially with scopes, since the lines are razor sharp and consistent... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
I'll re-test the Ultravid tomorrow, time permitting. But after going over my notes for today and re-doing the calculations I still get the same result. However, I noticed a typo in my first post about the 8x20. The VA should be 68", not 65". I measured the old Zeiss Jenoptem 10x50 also. Same... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
David, I have used the little Ultravid enough on very bright days to be pretty sure that it is not about matching light levels. Your other explanation of me being a three-millimeter guy (a flattering characterization if ever there was one) is more likely. It's true I haven't measured the light... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
I did a bit more today, this time with the 2" vapor deposited glass slide target back-illuminated with our light therapy lamp which gives 4000 K light at 10 000 lux intensity at distance of 31 cm. It gives excellent illumination for the slide, which I strap on the opaque surface of the lamp with... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Thank you all for nice comments, and special thanks to David for challenging me to do this trial. I’ll comment on some of your comments here, in the order of the posts in this thread thus far. First to David’s post #3, no, I wasn’t that surprised by the stabilized Canon values being so close to... -
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Canon 10x42 IS L Tripod vs hand-held vs IS testing
Today I had some time to start my part of the hand-held vs tripod-mounted vs Image-stabilized resolution testing. For the sake of clarity, I decided to start a new thread rather than post this into the existing 8x25 IS thread. David, maybe you could summarize your tests from that thread and post...