Sky-Watcher .77x Reducer/Flattener for EvoStar 150DX Telescope

Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available.
- This item is out of stock.
- We have no ETA from the manufacturer at this time.
- Sign up for back-in-stock alerts to be notified when this item becomes available.
Lower 48 States:
Orders over $50 ship free within the Lower 48 using a carrier and service we select based on your items and delivery location. Faster shipping options may be available at checkout.
U.S. Outside the Lower 48 (AK, HI, PR):
Free shipping on orders over $50 applies to many—but not all—items. Add items to your cart and enter your ZIP code to see available shipping options and any costs.
International Orders:
Free shipping does not apply to international orders. You’ll see available shipping options and costs during checkout. Some items can’t be shipped internationally due to size or manufacturer restrictions. Duties, taxes, brokerage fees, and tariffs are not included and are the customer’s responsibility.
- 34mm fully illuminated field, compatible with both APS-C and full frame sensors
- 89mm back-focus (55mm when back focus spacer and M48 ring installed)
- Drops f/ratio from native f/8 (1200mm) to f/6.2 (930mm)
- Reduces exposure time by 66% compared to native f/8
- 2.22 x 1.48-degree field of view when used with a full frame camera
- 1.45 x 0.97-degree field of view when used with APS-C crop sensor
- Only compatible with Evostar 150DX focuser
- Includes reducer, metal thread-on caps, back focus spacer and M48 thread adapter
- Built-in 2" filter cell for mounting filters into light path
Other Information
- Country of Manufacture: China
- 34mm fully illuminated field, compatible with both APS-C and full frame sensors
- 89mm back-focus (55mm when back focus spacer and M48 ring installed)
- Drops f/ratio from native f/8 (1200mm) to f/6.2 (930mm)
- Reduces exposure time by 66% compared to native f/8
- 2.22 x 1.48-degree field of view when used with a full frame camera
- 1.45 x 0.97-degree field of view when used with APS-C crop sensor
- Only compatible with Evostar 150DX focuser
- Includes reducer, metal thread-on caps, back focus spacer and M48 thread adapter
- Built-in 2" filter cell for mounting filters into light path
- 34mm fully illuminated field, compatible with both APS-C and full frame sensors
- 89mm back-focus (55mm when back focus spacer and M48 ring installed)
- Drops f/ratio from native f/8 (1200mm) to f/6.2 (930mm)
- Reduces exposure time by 66% compared to native f/8
- 2.22 x 1.48-degree field of view when used with a full frame camera
- 1.45 x 0.97-degree field of view when used with APS-C crop sensor
- Only compatible with Evostar 150DX focuser
- Includes reducer, metal thread-on caps, back focus spacer and M48 thread adapter
- Built-in 2" filter cell for mounting filters into light path
Other Information
- Country of Manufacture: China
| Product Status | sale |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |

Sky-Watcher .77x Reducer/Flattener for EvoStar 150DX Telescope


















