1PCS Nikon For Canon SLR M42 to RMS Adapter Ring Macro photography. I2L2

Description

Description
Description&Preview
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Description:
This adapter ring converts the RMS thread of the microscope objective lens (Olympus objectives and domestic microscope objectives are both RMS threads) into an M42 interface. If it is a Leica or Nikon microscope objective, its objective thread is M25*0.75mm, So be sure to confirm what kind of objective lens you are before buying
1. Autofocus is not available. The objective lens itself is equivalent to a manual lens without an aperture, and M gear is required.
2. The skin cavity can be used. The maximum distance of the microscope objective lens is 160mm, that is, when the skin cavity is used, the back focus of the SLR interface should be less than 160mm.
3. Connect the SLR, move the camera to focus, preferably with a macro stand, move the stand to focus. In foreign countries, they have used the manual precision lifting frame for microscopic shooting, and the effect is also very good.
4. Does the 4x objective lens and the 10X objective lens really have so much magnification?
No, 4X in the objective lens refers to 4 times in the microscope. In the microscope, the object passes through the objective lens to form a real image, and then the eyepiece matches the eye to form a magnified virtual image. At this time, the multiple is the multiple of the objective lens X eyepiece.
With 4X objective lens and SLR, the field of view is about 20-30mm. 2-3 cm look
10X is about 5-6mm.
20X is about 3-4mm
The field of view varies slightly with the distance between the objective lens and the SLR, and the size of the SLR chip will be slightly different, and I have not tested it in detail.
5. The circle around the objective lens is a little faint. The effect around the objective lens is not good. The field of view of the objective lens is designed to be 18mm, and the guaranteed image quality is not more than 70%. The surrounding effect may be bad. If you use a good microscope objective lens can improve this problem.
6. The question about whether the objective lens can focus at infinity. The microscope objective is designed to focus only at a specific distance. The 4X object distance is about 1-1.5cm, and the 10X and 20X are both several millimeters. So only focus on a specific location.
7. Compared with a macro lens, photomicrography with a microscope objective lens is a time-consuming and difficult thing. It requires patience and hard work. The biggest advantage is that it has a smaller field of view and cheap equipment.
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