24 results for "Kellner eye pieces" between $10.00 and $75.00

This eyepiece is a 3 element wide field Kellner design with coated optics and has a threaded barrel which accepts standard filters. Fits 1.25" telescope focusers. The optics are new wide field binocular eyepieces that we remounted for telescope use. Only have a limited supply so act quickly if you'd like one of these in your collection. Eye relief is 13mm and exit aperture is 17mm. Focal length is 23.3mm. Will give you great views.

Three elements mean the Antares Kellner eyepieces offer high contrast at a low price. Ideal for telescopes with a high focal ratio. Threaded to accept 1.25" filters. Internally coated to reduce reflections. Fold down rubber eye-guards included. AFOV of 40 degrees.

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This eyepiece is a 3 element wide field Kellner design with coated optics and has a threaded barrel which accepts standard filters. Fits 1.25" telescope focusers. The optics are new wide field binocular eyepieces that we re-mounted for telescope use. Only have a limited supply so act quickly if you'd like one of these in your collection. Eye relief is 13mm and exit aperture is 17mm. Focal length is 19.9mm. Will give you great views.

View larger image Our line of adjustable eyepieces fits any international standard microscope with a 23mm inner diameter eyepiece tube. They are specifically designed to accept glass disc reticles with 21mm or 19mm diameters. The diopter adjustable eye lens allows the reticle to be brought into sharp focus when superimposed on the real image plane, which is often difficult to achieve with fixed focus eyepieces. The reticle is held in place with a threaded retainer ring. For Kellner and Wide Field...

Kellner eyepieces were the most popular eyepieces for moderately wide field telescopic systems prior to the advent of some of the newer (and more expensive) designs. 3 element coated optics with field of view approximately 40 degrees and eye relief about 7mm. Fits standard 1-1/4" focusers. Metal barrel with knurled finger grip, and threaded for filters (thread is courser than that used for standard eyepiece filters, but ID is slightly larger. Put a little masking tape over the outside thread...

Kellner eyepieces were the most popular eyepieces for moderately wide field telescopic systems prior to the advent of some of the newer (and more expensive) designs. 3 element coated optics with field of view approximately 40 degrees and eye relief about 20mm. Fits standard 1-1/4" focusers. Metal barrel with knurled finger grip, and threaded for filters (thread is courser than that used for standard eyepiece filters, but ID is slightly larger. Put a little masking tape over the outside thread...

Lumicon Cross-Hair 1.25" Eyepiece 25mm Kellner LG1085

This 40mm 2” eyepiece is priced much lower than other more exotic designs. Despite its misleadingly low price, it is a good low power eyepiece that will please just about everybody with its performance. The three-lens Kellner design typically has more curvature of field and astigmatism at the edge of the field than much more expensive four-lens Plössl or five lens Erfle eyepieces. This can emphasize the coma in fast focal ratio reflectors. However, its 40mm focal length provides a huge 8.9mm exit...

View larger image Wide Field Design is similar to the Kellner, with one achromatic doublet and one plano-convex lens whose convex surfaces face each other. Ideal for use with higher power achromatic objectives.