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| This fully multicoated field flattener is designed specifically for medium format (6x7) photography with the 4" focuser Takahashi TOA-130F and TOA-150 refractors. With the TOA-130F, it provides a 5.3° flat field image over a 90mm diameter circle. With the TOA-150, it provides a 4.82° flat field image over the same 90mm diameter circle. Images taken with medium format cameras show pinpoint star images from one corner of the field to the other, with 60% of the field fully illuminated. The field flattener threads into the 4" focuser drawtube, after removing the coupling ring that connects to the 2" eyepiece holder of the scope. An optional T-mount for 6x7 cameras (#TFP2840 for the Pentax 6x7 and #TCA0200 for the Mamiya 645) threads directly onto the field flattener and your camera attaches in turn to the T-mount.
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Toll-Free Telephone Astronomics: 800-422-7876; Christophers, Ltd.: 800-356-6603 Alternate Telephone: 405-364-0858 24 Hour Fax Line: 405-447-3337
Telephone Hours: Monday 8 AM - 6 PM CST Tuesday-Friday 8 AM - 8 PM CST Saturday Noon - 5 PM CST
Store Hours: Monday-Friday 9 AM - 5 PM CST Saturday Noon - 5 PM CST
Astronomics / Christophers, Ltd. 680 S.W. 24th Ave. Norman, OK, 73069
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