Hotech 2" SCA Field Flattener

Hotech is pleased to announce the 2" SCA Field Flattener. A fully multi-coated 2 element lens with very efficient light transmission while maintaining the optical quality of your telescope. It is compatible with telescopes of f/5-f/8 ratios and provides excellent, sharp, and high resolution images even when the field is expanded. 

The Hotech 2" SCA Field flattener serves as a great item for astrophotography. When using a CCD camera, stable positioning is absolutely crucial for accurate and satisfying images. This SCA Field flattener with a t-adapter mounts the camera with compression rubber rings which accurately mount the CCD to the visual back for correct installation of the CCD. 

Visual backs can only accept certain eyepiece barrel sizes, so it can be tough to understand the compatibility between these items. However, with the Hotech 2" SCA Field Flattener, this problem is diminished because the gap that would normally be between the visual back and the eyepiece is vacant with the rubber rings expanding along the flattener. Hotech has now ensured that your camera is firmly placed in the visual back every time you insert it. 

During a windy environment, Hotech short profile design stabilizes the camera from low freuqncy oscillation. The 2" SCA Field Flattener T-Adapter is 0.75" to 1.25" measuring from the T-Thread bottom.

Hotech SCA Field Flattener

This field flattener is fully multicoated on two-element lens allowing the most efficient light transmission without sacrificing the precious collected light from your telescope. The SCA FFL accommodates f/5 to f/8 refractor telescope providing sharp image across the field. Our Self-Centering Adapter is an innovative adapting mechanism provides repeatable and stable connection between the camera and the telescope. We will demonstrate the SCA FFL installation on a 2” Crayford focuser which represents most imaging focuser.

Technical Specification:

• Fully multi-coated two-element high efficiency flattener lens - Zero reducer

• Accommodates f/5 to f/8 refractor telescopes - Built-in 2" SCA Adapter for a secure fit in focuser

• Accepts 2" / 48mm (M48-P0.75) filter thread - Standard T-thread for most imaging cameras attachment

• 55mm back focus distance.

• Zero reducer

• Built-in 2" SCA Adapter for a secure fit in focuser

• Standard T-thread for most imaging cameras attachment

Configuring Proper Spacing:

The space between the CCD chip to the T-Thread shoulder of the SCA Field Flattener is 55mm (see photo below). To achieve the proper spacing, user will need to know the following information:

Distance between the CCD chip to the camera T-Thread. This information should be available from the CCD mfg.

Space need to reach the total 55mm. Subtract the first data (CCD chip to camera T-Thread) from 55mm then find the appropriate length T2-Extension Tube from telescope equipment dealer to add up the remaining space.