topic Re: Figuring Out Canon EOS Rebel T6s Magnification Power in EOS DSLR & Mirrorless Cameras

Figuring Out Canon EOS Rebel T6s Magnification Power

Mike8 — Wed, 29 Jan 2020 20:29:20 GMT

When recording microscope images it's customary to indicate the power setting used. For instance, assuming a 10X ocular and say 4X objective, total magnification is achieved by multiplying one by the other, thus 10X4 = 40X. Since connecting the T6s to a microscope, all that is out the window. The 10X ocular was removed to make room for the 2X camera adapter taking its place, however, I don't think multiplying all my objectives by 2 will do the trick. The camera itself must be magnification capable since the images I've been getting far exceed the maximum size I would get using my most powerful objective, 40X, with the 2X adapter = 80X. Some of the images, because of their size and detail, seem closer to 600X or more! My former microscope camera was a Celestron 2MP with 30X. Again, figuring total power was easy, i.e., multiplying whatever objective I was using by 30. However, there's nothing, as far as I know, indicating the magnification power of the T6s. Does anyone out there have a handle on this, or where I might get a start solving this poser?

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

kvbarkley — Wed, 29 Jan 2020 21:29:50 GMT

Without a lens magnification of a camera is meaningless.

You will need a calibration slide like these:

[Sorry, we had to excise it due to forum guidelines]

(If the link gets excised, google microscope calibration slide. The link was to Thomas Scientific.)

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

Mike8 — Wed, 29 Jan 2020 23:00:17 GMT

The CMOS sensor has no bearing on magnification without a camera lens?

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

kvbarkley — Thu, 30 Jan 2020 02:53:24 GMT

No, no more than a piece of film does. It has an image size of about 22 x 15 mm. With my EF-S 60 mm Macro, I can have a focused image of things about the size of a quarter (1:1, or life size on the sensor) to Mount Everest.

A full frame sensor will let you see *more* but the *magnification* will be the same.

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

Mike8 — Thu, 30 Jan 2020 03:26:03 GMT

Thanks for your help. I'll try to find another way. All I need is ballpark.

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

kvbarkley — Thu, 30 Jan 2020 13:56:33 GMT

Like I said, the best way is with a calibration slide.

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

Mike8 — Thu, 30 Jan 2020 18:28:35 GMT

Thanks again!

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

kvbarkley — Thu, 30 Jan 2020 19:48:40 GMT

Oh, and I think a scale bar (for example a bar representing 1 mm) is better than a magnification power notation like 10X or 1000x. You have to know the size of the reproduced image to properly calculate the magnification power. After all, what if someone takes your image and projects it on a screen? In that case any magnification power is meaningless, but the scale bar is still relevant.

Re: Figuring Out Canon EOS Rebel T6s Magnification Power

Mike8 — Thu, 30 Jan 2020 22:25:52 GMT

Seems to be the consensus.