Raynox M-250 onto SX40? And other Macro questions.

Started Sep 26, 2012 | Discussions thread
VisionLight
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Re: Raynox M-250 onto SX40? And other Macro questions.
In reply to BobT, Sep 26, 2012

BobT wrote:

I must be confused about the macro use of the SX40. It appears to me that there are 2 MACRO settings. 1-requires no zoom, and the camera seems to need to be almost touching the subject. 2-uses the zoom and you must be several feet away from the subject. So what about inbetween there somewhere? Or is that not possible, and one needs to decide whether to use option 1 or 2, and just deal with it?

Can the Raynox M-250 Macro adapter be used on the SX40? If so, will it attach (clamp on to) the SX40 without any sort of additional adapter ring or tube? Then, how does this impact on the two options mentioned above? Is it best to simply focus with this adapter by physically moving in and out, rather than via the zoom control?

Any samples of the 250+SX40?

Thanks for straightening me out on all this. I'm a real fan of this camera, and would like to broaden my scope with it by attempting some macro. I will soon have access to a M-250.

The answer to your confusion very much depends on what size field of view you want to capture with your camera.

First, in macro mode. At 24mm, with the lens touching your subject, the camera will produce a horizontal field of view of about 2 inchs. Fine if your subject is not alive and fine if it does not need the light being blocked by the lens. At 135mm in macro mode, the lens must be at least 12 inchs from the subject and produces a horizontal field of view of about 3 inchs. At 840mm, the minimum focusing distance of 4.5 feet gives a horizontal field of view of 3½ inchs.

Second, in non-macro mode. At 24mm, with the lens 2 inchs from the subject, the camera will produce a horizontal field of view of about 2½ inchs. Slightly wider than in macro mode, but now not touching your subject. Other focal lengths in non-macro mode produce the same field of view as in macro mode. This makes macro mode really only somewhat useful at 24mm.

Third, further discussion of using the zoom for macro. As discussed above, the 840mm zoom from its close focusing distance of 4½ feet gives a field of view of 3½ horizontal inchs. Turn on the 2.0TC and the lens becomes an effective 1680mm and the field of view becomes 1¾ horizontal inchs. Go to 4x Digital Zoom and the field becomes 7/8 horizontal inchs. Here is an example of the 2.0TC and full zoom from 4½ feet that I took yesterday. The little critter in about 1 inch in size, nose to tip of wing, so the horizontal field of view of the whole image is about 1¾ inchs:

I could have increased the magnification by swithching to 4x Digital Zoom, but didn't need to do so to get my desired composition. Besides, even at 4½ feet away, the critter was getting annoyed with me and kept walking deeper into the brush to get away from me. But at that magnification, I would have been able to fill the frame with its whole body, excluding the antenae which would not have fit.

Fourth, the M-250. Need to get closer than what I've described above? Then, as seen in images posted on this forum, you need the M-250. I'm currently happy getting the results without it, so I don't have one and can't go into its use. Maybe someone else will give you the particulars.

Hope this has been helpful.

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