Brand and Model: | TMB Super Monocentric 5mm |
Price ($USD): | $200.00 |
Type: | Monocentric |
Focal Length: | 5 mm |
Barrel Size: | 1.25 |
Apparent FOV: | 30.0 degrees |
Field Stop Dia.: | 0.0 mm |
Eye Relief: | 3 mm |
Elements: | 3 |
Weight (lbs): | |
Description: | This 1.25" Super Monocentric TMB eyepiece is an unexcelled medium high to high power eyepiece. It works particularly well with short and medium focal length refractors to provide unequalled lunar, planetary, and binary star views. High quality and accurately collimated equatorial reflectors with focal ratios of f/6 and above will also work well. The better-quality 7†aperture and larger Schmidt- and Maksutov-Cassegrains will also work well, although their focal lengths and focal ratios will provide narrow exit pupils and very high magnifications that will often exceed the practical limits of your seeing conditions. It can resolve compact globular clusters in exquisite detail, if the field of your eyepiece/telescope combination is wide enough to hold them. With a relatively narrow 30° field of view, it is not designed to encompass open clusters or large scale faint objects (even on a 540mm focal length instrument its field of view is little more than a quarter of a degree across). However, its unsurpassed 99% light transmission makes it surprisingly good for picking out faint and compact planetary nebulas against a stellar background. That said, the buyer should still recognize that this eyepiece is optimized for the highest possible contrast and highest definition lunar and planetary images, not deep space observing. It will reward the serious lunar/planetary observer with the best images that his or her telescope and skies are capable of producing. The highest quality and best maintained optics will benefit most from this eyepiece. |