4" TEC Field Flattener for 140 / 160 / 180 / 200 FL APO

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4" TEC Field Flattener for 140 / 160 / 180 / 200 FL APO

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€ 890.00 Price excl. German VAT tax (19%): € 747.90

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  • Is specifically designed for the APO140 / 160 / 180 / 200 FL F/7
  • Corrects field curvature and off-axis astigmatism, designed especially for use with large format cameras
  • Back focus distance of 85mm from flange to the focal plane
  • The edge of field distortion is less than 0.5%
  • With Pentax 6x7 Bajonett Adapter

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€ 890.00 Price excl. German VAT tax (19%): € 747.90

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Ruediger 12/01/2020 13/01/202019:50
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Recommend:
Definitiv
Pinpoint stars all over the field
I have just received the FF for my TEC 140 ED and I am enthusiastic!

Currently I am using an ATIK 16200 with an APS-H Sensor and have pin point stars over the complete FOV. It is so precise that it reveals any other flaw in your image train very quickly. e.g. having a slight sensor tilt. All connections are absolute solid and tight. In combination with a the quick release there is no bending or shifts.
Like all flatterers it is absolute mandatory to keep correct working distance of 85 mm on the millimeter.

I observed a slight increase of focal length from 980 mm to 1016 mm (both measured).

Images:
First 2 pictures showing the the image train on the TEC.
Last is showing 1:1 scaled corner view of an image taken with ATIK 16200, Lum, 30s, Binning 1 (very poor seeing, foggy and very flickering), 4499x3599, Pixel size 6nm
  • Outstanding optical performance
  • heavy, but unavoidable at this diameter
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