Barlows, reducers etc...
The Barlow lens is a diverging lens which, used in series with other optics in an optical system, increases the effective focal length of an optical system thereby increasing magnification. A reducer lens does the opposite of the Barlow lens.
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All New Adjustable Flat6AIII Field Flattenerر.ع.88.810 Add to cart
This very elegant 2″ reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. WO Flat 6AIll will provide good illumination and flat field across 97% of full frame sized sensors.
New Adjustable Flat61 for Z61ر.ع.84.500 Add to cart
Getting the best images when taking photographs of the night sky can be a tricky task. There are magnificent telescopes that make this task a little easier, and William Optics has provided a way to take this aid one step further. This William Optics Flat61 Field Flattener is specifically made for the Zenithstar 61 telescopes. They provide a flat field, an image circle of 43mm, for those who wish to do astrophotography.
Adjustable reducer flattener Flat61R for Z61ر.ع.110.200 Add to cart
William Optic’s 0.8x Reducer/Field Flattener is a great tool to use when you want to improve image quality by being able to adjust spacing without the need for extension tubes. This particular 0.8x field flattener and reducer is designed specifically for the William Optics Zenithstar 61 refracting OTA.