Dave Martin

Regarding the original question, if you make the camera-subject connection rigid then VR should be off.Dave

Thanks for answering. I understand your challenge.You say even your breathing causes problems - how exactly? What is causing the camera to move relative to the subject as a result of breathing?...

Have you considered using flash? You should be able to get short exposures with a moderate flash setup, focused if necessary.Kenko makes extension tubes that work with G type lenses. Perhaps you...

OP specified a 50mm lens fixed so it had a focus distance of about a foot.A 50mm lens, 250mm from the sensor has a magnification of 4, and a 62.5mm focus distance (image plane to object plane)....

I think it is what the op was looking for - moving the object away from the fixed lens but not keeping the same magnification.The only way I can think of to keep lens-image distance constant and...

As Cornea boy says you can do it by putting a negative lens in front of the 50mm lens.The goal is to increase the focal length beyond the original.To focus at infinity the system's focal length be...

You can do it optically by adding a lens that creates a real image at the point in space yor fixed lens is focused on - a transfer lens if you will.Put a bellows on your primary lens and a short...

There's an important difference between "causes image degradation" and "may result in image degradation".The question is (for use with a normal lens): do tubes or close-up attachments result in...

Not exactly: I said:" Close-up lenses can provide excellent results in the center of the photo and provide a bright image in the viewfinder so you may find them to be excellent for most...

Chas Tennis wrote:..... With bellows cameras you could tilt the film plane relative to the lens -that is, it would focus closer on one side than the other. A person on the right side of the...

I originally said that if you wanted to insure edge and corner close-up quality one should use tubes rather than close-up lenses.Now I've seen a case with evidence by to the contrary. However, in...

Here's a link to examples of macros shot with Raynox 150 & 250 close-up lenses on crop frame DSLRs.Remove parentheses... http://www (.)pentaxforums.com/forums/lens-clubs/74221-raynox-macro-club.html

My setup and workflow were very simple. Photo of the laptop screen, transfer to the computer. The biggest criticism is that a lot of light entered the lens from the periphery (but this isn't always...

This is in response to your suggestion that the Raynox 150's poor edge performance is due to vignetting as a result of its 38mm diameter.Here's a test shot of my lcd display using an achromatic...

First I did not make a "sweeping assertion about close-up lenses being worse than extension tubes..." rather, I qualified the assertion to cases when edge quality is important.I chose not to...

I've a PhD in Materials Science and Engineering, now retired. I did 50:50 research and teaching in the engineering college of Iowa State university for a little over 30 years. Much of the research...

Brand doesn't matter so much as focal length or diopter strength (1000/focal length) and whether the lens is either achromatic or apchromatic (chromatic aberration corrected at 2 or 3 wavelengths...

The op asked for recommendations regarding close-up lens and/or tubes which certainly implies macros to me.Close-up lens additions, tubes, and bellows are common, rather than foolish setups for...

That's not been my experience with achromats or better closeup lenses on good quality primary lenses. Here's a test of a Raynox 150 (208mm) on a Tamron 90mm macro lens shooting a flat subject...

Apparently you did not read my complete post which clearly says that close-up lenses are convenient and good for cases where a high quality image of the center of the field is required.However if...