Askar Focal Plane Adjuster

Product Overview

The Askar Focal Plane Adjuster is an astrophotography accessory used to fine-tune the camera-side focal plane position in an imaging setup. It is intended for users who need precise spacing adjustment to optimize field correction and image quality.

Who Is This Product Best For?

This accessory is best for deep-sky astrophotographers who are tuning an imaging train and need a mechanical adjustment option for achieving the correct focal plane or backfocus spacing.

Why Choose This Product?

• Helps fine-tune focal-plane spacing in an imaging train.
• Useful when optimizing corner star shapes and field flatness.
• Designed as a practical accessory for telescope imaging setups.
• Supports more precise spacing control than fixed spacer rings alone.

Recommended Uses

• Camera spacing adjustment for astrophotography.
• Backfocus tuning with reducers, flatteners, and correctors.
• Optical train setup for cooled cameras, filter drawers, and OAGs.
• Deep-sky imaging systems where precise spacing matters.

Compatibility and Accessory Notes

Confirm thread size, spacing range, mechanical clearance, and compatibility with the user's telescope, reducer/flattener, camera, filter drawer, and off-axis guider before use. This listing is a draft with placeholder pricing for manual review.

Important Limitations

• This is a mechanical spacing accessory, not an optical telescope or camera.
• Correct use depends on the required backfocus for the full imaging train.
• Pricing is set to $0.00 as a manual placeholder.

Our Recommendation

Ontario Telescope recommends this accessory for imagers who need finer control over camera spacing than fixed extension rings provide.