Askar - Focal Plane Adjuster

SKU
ASK-FPA
$169.00
Availability : In Stock
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In daily astrophotography, many users face image distortions caused by an imperfectly flat focuser or camera sensor, a problem that becomes more noticeable as sensor sizes increase. Achieving proper perpendicular alignment with the optical axis of the telescope or lens is essential for the best image quality. The Askar Focal Plane Adjuster provides a convenient solution. Unlike traditional tilters with a 3-point push-pull mechanism, which can unintentionally affect back focus, the Askar Focal Plane Adjuster uses a spherical adjustment system. This design eliminates the back focus issue and focuses solely on adjusting the image tilt. Additionally, it simplifies the process by removing the need for frequent assembly and disassembly between imaging sessions.

Askar Focal Plane Adjuster

Focal Plane Adjuster Features

  • In standard astroimaging setups, users often experience image distortions due to an imperfectly flat focuser or camera sensor, a problem that becomes more noticeable with larger sensor sizes.
  • Achieving proper perpendicular alignment to the optical axis of the telescope or lens is crucial for optimal image quality.
  • The Askar Focal Plane Adjuster addresses this by providing a user-friendly solution to adjust sensor tilt, without the issues seen in traditional 3-point push-pull systems that can unintentionally affect back focus.
  • Features a spherical adjustment mechanism, which eliminates the negative impact on back focus while making precise tilt adjustments to improve image quality.
  • Simplifies the imaging process by removing the need for constant assembly and disassembly between image sessions.
  • Includes a front female M54 thread and a rear male M48 thread, with an included M54 to M48 adapter for seamless conversion without altering the overall thickness.
  • Allows the adjuster to be used with a wider range of focusers and cameras.
  • The total thickness of 18mm is specifically designed to match the M48 filter threaded ring on the rear end of some Sharpstar Optics telescopes.
  • Users of Sharpstar telescopes like the ASKAR V, 71F, and 50EDPH can replace the filter thread ring with the Askar Focal Plane Adjuster without needing to recalculate back focus.
  • The Askar Focal Plane Adjuster provides a tilt angle adjustment range of ±1°, with clear scale markings every 5' for easy and precise calibration.

Focuser Tilt to Overcome Image Distortions

In everyday astrophotography, many users encounter image distortions due to issues with the focuser or the camera sensor not being perfectly flat, becoming more apparent the larger the sensor size starts to get. This makes it crucial to have this perpendicular alignment to the telescope or lens optical axis for optimal results. This is where the Askar Focal Plane Adjuster comes into play with a user convenient twist. Unlike other tilters which have a 3 point push pull framework, and thus unintentionally can affect backfocus, the Askar Focal Plane Adjust has a spherical adjustment which removes this counter effect and strictly adjusts image tilt. In addition, this removes the need for constant assembly and disassembly between image sessions.

Easy to Use Design

The Askar Focal Plane Adjuster consists of a front female M54 thread and a rear male M48 thread, and on top of that comes with an M54 to M48 adapter, allowing users to convert the front M54 thread to the M48 thread without affecting the overall thickness, thus opening the doors to be used with a wider range of focusers and/or cameras.

With a total thickness of 18mm, the Askar Focal Plane Adjuster is specifically designed to match the thickness of the M48 filter threaded ring found on the rear end of some Sharpstar Optics telescopes, meaning it can connect directly to those. In the case of ASKAR V, 71F, and 50EDPH optical tubes, the filter thread ring can be replaced with the adjuster without backfocus recalculation.

The Askar Focal Plane Adjuster allows for a tilt angle adjustment range of ±1°, with clear scale markings printed every 5' for precise and easy calibration.

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Brand Askar
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  • Askar Focal Plane Adjuster
  • Askar Focal Plane Adjuster
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