Askar 185APO 0.8x Full Frame Reducer User Manual
- June 1, 2024
- Askar
Table of Contents
Askar 185APO 0.8x Full Frame Reducer
Product Specifications
- Model : 185APO 0.8x Full Frame Reducer
- Focal Plane: 6.5
- Reduction F a ctor: 0.8x
- Weight : 0.95kg
- Compatible Thread Sizes : M480.75, M540.75, M681, M921
Product Usage Instructions
Installation Instructions:
- Unscrew the 2-inch adapter and the 1.25-inch adapter from your telescope.
- Remove the dust cap from the reducer and screw it onto the 185APO telescope.
- Securely lock the locking ring in place.
Usage Guidelines:
The 0.8x reducer is designed to reduce the focal ratio of the Askar 185APO
telescope to F5.6, providing a wider field of view and faster exposure times.
This makes it ideal for capturing large areas of nebulae, star clusters, and
fast-moving celestial objects.
Instructions for use
The 0.8x reducer can bring Askar 185APO’s focal ratio down to F5.6. 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 0.8x reducer adopts a quadruplet design and supports a 44mm full-frame
image circle. The overall weight is 0.95kg. The back focus from the M48 thread
is a standard 55mm. The front thread is M841. At the camera end, it is
equipped with M681, M540.75, and M480.75 three sizes of adapters, which are
convenient for connection. At the same time, it 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.
Features of Product
Parameters
- After attaching 185APO Focal length： 1036mm
- After attaching 185APO Focal ratio： f/5.6
- Lens Number: Quadruplet design
- Back Focus: 55mm（from the base of M48 male thread）
- Weight.95kg
- Rear-end thread type：
- M68×1
- M54×0.75
- M54×0.75-M48×0.75 (M48×0.75 filter thread inside)
Installation instruction
- Unscrew the 2″ adapter and the 1.25″ adapter
- Unscrew the dust cap of the accessory and screw it into the 185APO
Attention
When used with a 2″ diagonal, 0.8x reducer or 1x flattener, please refer to
the figure.
- Rotate the locking ring in the direction of the arrow
- Pull the retractable part out completely
- Lock the locking ring reversely
DO NOT LOOK AT THE SUN THROUGH A TELESCOPE. IT WILL CAUSE IRREVERSIBLE DAMAGE
TO YOUR EYE.
www.sharpstar-optics.com
FAQ
Q: Can the reducer be used with other telescopes?
A: The reducer is specifically designed for use with the Askar 185APO
telescope and may not be compatible with other models.
Q: How do I clean the reducer?
A: Use a soft, lint-free cloth to gently wipe the lenses of the reducer. Avoid
using harsh chemicals or abrasive materials that may damage the optics.
Q: Can I stack multiple reducers together?
A: It is not recommended to stack multiple reducers as it may introduce
optical aberrations and reduce image quality.