Re: CANON M50 + Vitrox booster + Canon f2.8 MACRO 100mm
1
cjgj wrote:
Hello, beginner to photography here.
I was hoping to use the M50/Vitrox booster as an EF mount camera, I mounted the Canon f2.8 MACRO 100mm and what's weird is that with the CANON f2.8 MACRO
100mm, on the viewfinder the photos look great but when I actually take the photos, they are pretty blurry and very grainy. (for example taking photos of the details of a watch, looks great in viewfinder but the actual photo is super grainy and little darker) - see below picture. Any idea why?
The point of a focal reducer, like your Viltrox booster, is to widen the field of view of a larger format lens used on a cropped format and decrease its f/ number in order to limit the depth of field. That's the opposite of what you're trying to achieve with macro photography, where the problem is trying to maximise the size of the image and its depth of field. I'm sure you would get better image quality with a plain mount adapter and the lens set to say, 0.5× magnification than with the Viltrox and the lens set to 0.7× magnification for the same sized image.
Another issue I'm having, when I try to take photos with wide depth of field (f20 ish) with shutter speed between 100-200 and auto ISO, the viewfinder goes really really dark to a point I can't see what I'm shooting. Is M50/Vitrox/Canon macro f2.8 combo not meant to be shot with f stop so high? This is a problem for me as I got the combo to do some wide field of depth shots that require f stop >20.
Thank you so much in advance!

As others have said, this is under-exposure caused by not having enough light to use an ISO that the camera can deliver for an exposure of about 1/100 @ f/22. You need a lot more light or a tripod or a copy stand.