William Optics
William Optics Dr. Flat Master (0.8x Reducer)
William Optics Dr. Flat Master (0.8x Reducer)
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The William Optics Dr. Flat Master is an apochromatic triplet reducer/flattener designed for 12" - 16" WO and GSO Ritchey-Chrétien telescopes. It reduces the focal length by 0.8x and flattens the field, making it ideal for full-frame sensors with a 52mm image circle. Featuring an M48 x 0.75 camera connection and a backfocus distance of 86.15mm, this accessory enhances your astrophotography setup by expanding your field of view and ensuring edge-to-edge sharpnes.
- Flattener Power
- 0.8 x
- Lens Type
- 2 Groups 3 Elements
- Optical Length
- 64.5 mm
- Telescope Thread
- M92 x 1 x 6 mm
- T-mount Thread
- M48 x 0.75 x 4 mm
- T-Mount Support
- Canon EF, RF Nikon F, Z Sony E Pentax K MFT (M4/3) FUJI X
- Camera Format
- Full Frame APS-C M4/3
- Weight
- 697.4 g / 0.0 lbs
RC Telescope
- Back Focus
- 86.15mm
- Image Circle
- ∅52mm
 |
FLAT 61A
1.0x |
FLAT 73A
1.0x |
FLAT GT
1.0x |
FLAT 6AIII
0.8x |
FLAT 68III
1.0x |
FLAT 7A
0.8x |
FLAT 8
0.72x |
Ultra 132
0.79x |
Ultra 156
0.79x |
Dr. Flat
0.8x |
|---|---|---|---|---|---|---|---|---|---|---|
| GS-61 | ★ | |||||||||
| Z-61 | ★ | |||||||||
| Z-73 | ★ | |||||||||
| Z-81 | ★ | |||||||||
| Z-126 | ★ | ★ | ||||||||
| GT-71 | ★ | ★ | ||||||||
| GT-81 | ★ | ★ | ||||||||
| GT-81 WIFD | Adapter | ★ | Adapter | |||||||
| GT-102 | ★ | ★ | ★ | |||||||
| GT-153 | ★ | ★ | ★ | |||||||
| FLT-91 | Adapter | Adapter | ||||||||
| FLT-120 | ★ | Adapter | ||||||||
| FLT-132 | ★ | ★ | ★ | ★ | ||||||
| FLT-156 | ★ | ★ | ★ | ★ | ||||||
| RC Series | ★ | |||||||||
| Pleiades Series | No Flattener Required | |||||||||
| Cat Series | No Flattener Required | |||||||||
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Research It
Find the product you want.
Talk to Us
Get expert guidance fast.
We Source It
Delivered within 4 weeks.
Enjoy It
Be happy with your gear.
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Yes. On top of the manufacturer's warranty, we also offer a Replacement Guarantee on all online orders. In the event that the product is defective or damaged during shipping, you will receive a replacement.
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We'll refund you 90% if you cancel before dispatch. Cancellations after dispatch are complicated. Take a look at the our Policy here
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We have strict return/refund policies as a company that deals with fragile products. Casual returns are not permitted. Items that are not damaged in transit or defective cannot be returned.So please take a moment to review our Refund Policy.
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