Sharpstar 2" 0.95x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors with M48 Thread
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
Product Details
This 2" coma corrector/focal reducer works with many Newtonian reflectors to correct for coma and ensure sharp images across a 44mm image circle. The correction is especially optimzed across the inner 28mm image circle to suit cameras with APS-C or smaller sensors. It's ideal for Newtonians with an aperture of 150mm to 600mm and native focal ratio of f/3 to f/6. This corrector also provides a small degree of focal reduction of 0.95x which takes an f/4 reflector to f/3.8 and an f/5 reflector to f/4.75, slightly reducing the required exposure time and improving the peripheral star image quality.
Specifications：
- Model: For 150mm-600mm diameter Newtonian paraboloid reflectors
- Focal ratio：For Newtonians of focal ratio f/3-f/6
- Magnification: 0.95x
- Thread specification on camera end: M48x0.75 Male
- Image Circle: 44mm, the optimal image in central 28 mm
- Number of lenses: Triplet
- Outer barrel diameter: 2"
- Back focus: 56mm
- Overall Length: 79.7mm
- Optical Coatings: Fully multi-coated
- Weight: 0.22kg
Other Information
- Country of Manufacture: China
