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#7704 Super ED reducer.

"...I have been using all of BORG reducers. Yes, this is the best. Although it’s most expensive, it creates sharpest image...."

http://digiborg.wordpress.com/2012/06/1 ... r-reducer/

某APM 130及115同學都有一個，也可用在105/650上。

配合APM 130/780合成光圈是f3.7，可覆蓋全片幅。

This one also matches APM-LOMO 80/600. But not APM-LOMO 80/480 in full frame.
viewtopic.php?f=21&t=719
7704 delivers sharp stars at full frame corners with strong reducing power, 0.65X. But in term of vignetting, it cannot beat Riccardi & TMB reducers. My hope is that the new 7870 can match my APM-LOMO 80/480.
PS* I can play & interchange reducers with other APM classmates. This mean I can try all, Riccardi, FLT, 7704, 7887, 7870, TS2 etc.... We got full spectrum!

willis 寫:This one also matches APM-LOMO 80/600. But not APM-LOMO 80/480 in full frame.
viewtopic.php?f=21&t=719
7704 delivers sharp stars at full frame corners with strong reducing power, 0.65X. But in term of vignetting, it cannot beat Riccardi & TMB reducers. My hope is that the new 7870 can match my APM-LOMO 80/480.
PS* I can play & interchange reducers with other APM classmates. This mean I can try all, Riccardi, FLT, 7704, 7887, 7870, TS2 etc.... We got full spectrum!

you have to taste TMB 3.5" flattener someday later...

viewtopic.php?f=29&t=2884&start=40#p20075