OMAX 0.37X Adjustable Reduction Lens for Microscope Camera - Focal

In this review of the OMAX 0.37X Adjustable Reduction Lens, the bottom line is straightforward: it is for microscopists who need an easy way to reduce magnification and adjust focus between a C-mount camera and a 23.2 mm ocular tube. The reviewer found the lens useful for matching camera field of view to the microscope eyepiece and for fine-tuning focus without swapping adapters. It delivers a predictable 0.37X reduction with a compact, 60 mm total height and a standard male C-mount that simplifies installation on most microscope cameras.

Key Features

• 0.37X Reduction: Lowers the effective magnification to capture a wider field of view when using a camera on a microscope, preventing cropped images.
• Focal length adjustable: Allows small focus corrections to better align the camera sensor plane with the image formed by the microscope optics.
• Standard C-mount: The male 1 in x 32 tpi C-mount makes it compatible with most microscopy cameras without extra modification.
• Ocular tube fit: A 23.2 mm diameter fit for the ocular tube provides a snug mechanical connection with common microscope heads.
• Compact form factor: With a total height of 60 mm the lens stays out of the way and preserves working distance at the camera port.
• Included accessories: Ships with two lens covers to protect optics when the unit is not in use.

Who It's For

This reduction lens is best for laboratory technicians, hobby microscopists, and imaging enthusiasts who need to reduce magnification for photographic documentation while retaining the ability to fine-tune focus. It is particularly helpful when the camera sensor is too small relative to the eyepiece image and a wider field is required.

Those who should look elsewhere include users who require motorized optics, integrated zoom, or specialized nonstandard mounts; the OMAX unit is a manual, fixed-reduction lens intended for standard C-mount workflows and simple optical adjustment.

Pros & Cons

Pros

• Provides a reliable 0.37X reduction to expand the camera field of view and reduce cropping.
• Focal length adjustment lets users fine-tune image focus without swapping adapters.
• Standard C-mount and 23.2 mm ocular fit make it easy to install on common microscope setups.
• Includes protective lens covers to keep optics clean during storage.

Cons

• Optical quality expectations should match its price and function; it is a reduction accessory rather than a high-end imaging objective.

Specifications

Reduction	0.37X
Focal adjustment	Adjustable focal length
Camera mount	Male C-mount 1 in x 32 tpi
Ocular tube diameter	23.2 mm
Total height	60 mm
Warranty	1-year against manufacturing defects
Packing list	0.37X adjustable reduction lens; 2 lens cover

Our Verdict

The OMAX 0.37X Adjustable Reduction Lens is a practical, value-minded accessory for anyone needing to widen the camera field of view and make small focus corrections on a C-mount microscope camera. It is a straightforward, well-specified tool for lab and hobby use, offering useful mechanical compatibility and a one-year warranty that makes it a sensible choice for routine imaging needs.

Frequently Asked Questions

Will this fit my microscope camera?
It fits cameras with a standard male C-mount (1 in x 32 tpi) and mates to microscopes that accept a 23.2 mm ocular tube.

Does it change focus as well as magnification?
Yes, the unit offers adjustable focal length to help align focus between the microscope optics and the camera sensor.

What comes in the box?
The packing list includes the 0.37X adjustable reduction lens and two lens covers for protection.