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  • Deluxe 1x field flattener for triplet refractors Deluxe 1x field flattener for triplet refractors

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Deluxe 1x field flattener for triplet refractors

Product code: PLLFLAT1XDX

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Quick Overview

The field curvature is a normal effect that occurs in refractors and generates an image deformation (the stars are stretched) to the edges of the image itself. This effect is more visible when the focal ratio of the instrument is very short (for example f/5) and when large sensors are used (such as those of the DSLRs).

Our Deluxe 1x field flattener for triplet refractors can be used with any triplet refractors (optimized for instruments with f/6 - f/7 focal ratio): inserted into the focuser in front of the camera, it corrects the field up to Full Frame sensors (24x36mm) and doesn't reduces the telescope focal length. On the camera side, the field flattener comes with a T2 thread (M42x0,75) and a M48 thread (M48x0,75 male) for connection to the CCD or DSLR cameras. This field flattener, to have better performances, requires to place the camera's sensor at 55mm from the rear of the flattener.

Availability: In stock

22% tax incl
if you pay by bank transfer €378.30


When you want to take pictures to wide field objects, we suggest to use cameras (such as cooled CCD or DSLR cameras) with large sensors. For example, to record extended objects like the Andromeda Galaxy (M31) with refractors with not too high focal length, we recommend a sensor with at least 20mm diagonal.  However, using these sensors, you must pay attention to field curvature, an optical effect that leads to the image distortion towards the edges of the field. The Deluxe 1x field flattener for triplet refractors, connected in the focuser before the camera, perfectly flatten the field even with large sensors (up to Full Frame sensors with 23x16mm dimensions) allowing you to record perfect pictures!



This field flattener, on camera side, comes with 2 adapters: one with T2 thread (M42x0,75) and one with M48 thread (48x0,75 male) to connect CCD or DSLR cameras. This way you can connect any camera or photographic accessory keeping the same 55mm backfocus (optimal distance from camera sensor and rear thread of the field flattener). On the telescope side, you can also find a M48 thread to connect 50,8mm filters: in this way you can simply add a filter, for example for the light pollution reduction.

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