New Adjustable Flat73A for William Optics Telescope

New Adjustable Flat73A for William Optics Telescope

New ! Adjustable Flat73A for William Optics f/5 to f/7 telescopes

  • Universally applicable for telescopes between f/5 and f/7
  • Focusing travel is adjustable
  • M63 thread on telescope side
  • M48 thread on camera side
  • Integrated M48 filter thread
Manufacturer : William Optics
SKU : WiO- SKU_P-FLAT73A
Price: 309.00 € incl tax 19% (Germany)
Delivery date : on request
Product description

The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. This curvature causes stars that are imaged at the edge of the field of view to be less sharp. The flattener, also called a field flattener, corrects this effect. Astrophotographers can then enjoy images where the stars remain sharp right out to the edge of the exposure. The flattener is installed between the telescope and the camera.

Installation:The flattener is securely screwed on to the focuser thread. Simply unscrew the coloured anodised end piece, as shown in the picture on the right. This end piece is used to attach a socket, but is no longer required when using a flattener. Keep it safe in case you want to use the lens visually with a zenith mirror. The flattener can simply be screwed into the focuser’s thread.
A T2 thread is supplied for mounting a camera. If you want to use a DSLR camera, use the correct T2/bayonet adapter for your camera manufacturer. You will end up with a securely built system - highly stable with no tilting!

The flattener is adjustable. Set the correct distance and secure it using the knurled locking ring. So you do not need a separate extension sleeve.

Filters can be screwed directly on to the flattener using the M48 thread. Simply screw off the end piece on the camera side to do so. This reveals an M48 thread into which the filter can be screwed. Then screw the flattener back together and your apo is done!

Scope of Delivery:

  • Flattener
Products specifications
Connection to telescopeM63 Gewinde
Connection to cameraM48 thread