4x PLAN Infinite Microscope Objective (short case)

In stock, ready to ship!

This is the cheaper version of the 4X PLAN infinite microscope objective with a shorter case, resulting in a 3-4 mm greater working distance.

Please note: It is sharp in the middle but weak in the corners where you miss the sharpness from the normal 4X PLAN. This objective is more for intended for testing purposes or for beginners.

It has NA of 0.1 and requires a 180mm or longer telephoto lens or a tube system. Effective working distance is around 14 mm. It is an excellent choice to start doing extreme macro using an objective.

Because it is an infinite objective, magnification can be varied by using different focal length tube lens. For example, when a 200mm lens is used as tube lens, magnification is 4x200/180 = 4.44x.

It has been tested that with some tele objectives there could be some vignetting on full format cameras if objectives is less than 180mm.