Saddgo M42 to RMS Thread Microscope Objective Lens Adapter Microscope Accessories

It a time-consuming for microscopic photography with a microscope objective. This M42 to RMS Adapter Rings must be used combined with SLR camera adapter, it can not be used individually. If you need SLR adapter, please contact us. thank you Regarding whether objective lens can be infinitely focused? The microscope objective focused only at a specific distance. 4X about 1-1.5cm, 10 X,20X are a few millimeters. So objective lens can not be infinitely focused. It can not auto focuses, objective itself equivalent to a manual lens without aperture, you need to use the M-position. After connecting the SLR and move the camera to focuses manually, best to have a macro-frame to move the shelf to focuses. The circles around objective lens will be a bit faint.