Askar 0.75x Reducer for Askar 71F Telescope
Ships by Next Business Day
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.
The 0.75x reducer can bring Askar 71F's focal ratio down to F5.2. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.
The 0.75x reducer adopts a triplet design and supports a 44mm full-frame image circle. The overall weight is 0.23 kg. The back focus from the M48 thread is a standard 55mm. Both end threads are M59*1. The 71F photographic extension tube has two sizes of M54*0.75 and M48*0.75 adapters, which can be directly and easily connected to the 71F 0.75x reducer for use. At the same time, the adapter has a built-in M48*0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.
Specifications
- (After attaching) 71F Focal length: 369mm
- (After attaching) 71F Focal ratio: f/5.2
- Lens Number: Triplet design
- Back Focus: 55mm( from the base of M48 male thread)
- Weight: 0.23kg
- Rear-end thread type: M59*1
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
The 0.75x reducer can bring Askar 71F's focal ratio down to F5.2. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.
The 0.75x reducer adopts a triplet design and supports a 44mm full-frame image circle. The overall weight is 0.23 kg. The back focus from the M48 thread is a standard 55mm. Both end threads are M59*1. The 71F photographic extension tube has two sizes of M54*0.75 and M48*0.75 adapters, which can be directly and easily connected to the 71F 0.75x reducer for use. At the same time, the adapter has a built-in M48*0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.
Specifications
- (After attaching) 71F Focal length: 369mm
- (After attaching) 71F Focal ratio: f/5.2
- Lens Number: Triplet design
- Back Focus: 55mm( from the base of M48 male thread)
- Weight: 0.23kg
- Rear-end thread type: M59*1
| Product Banner Type | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
Askar 0.75x Reducer for Askar 71F Telescope