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Kyoei 80mm f/3.5 M42

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#1 Cadmium

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Posted 09 June 2020 - 05:43

This is the Kyoei 80mm f/3.5, M42 mount, 34mm front filter thread.
Transmits UV deep, like the Kuribayashi/Kyoei 35mm f/3.5 lenses (only with some added focus shift, see the red R).

Attached Image: Kyoei_80mm_front.jpg

Attached Image: Kyoei_80_8.jpg

Kyoei 80mm f/3.5 lens compared to Kuribayashi 35mm f/3.5 lens.
Attached Image: Kyoei_80mm_9_Sparticle_Test_900.jpg

Attached Image: KYOEI_80_M42_threads_8.jpg

Attached Image: Kyoei_80_BU_Sparticle_9.jpg

Attached Image: Kyoei_80_330AF20_Sparticle_BP_new_9.jpg

Attached Image: Kyoei_80_RG9_Sparticle_9.jpg

Attached Image: Kyoei_80_BG40_Sparticle_9.jpg

I haven't used this lens much, so I can't think of any UV shots using it, other than the Sparticle tests, but here are some IR tests using a Schott RG850 filter on the Kyoei 80mm f/3.5 lens:
Attached Image: Tree_65_14.jpg

Attached Image: Oak_741_14.jpg

Attached Image: Kyoei_80mm_leaf_12.jpg

100% crop
Attached Image: Kyoei_80mm_100crop_10.jpg

Edited by Cadmium, 09 June 2020 - 18:50.


#2 Andy Perrin

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Posted 09 June 2020 - 05:52

Cadmium, have you tried taking a sparticle picture with the UV Nikkor yet to see if there are any brightness variations when the lens is not an issue? As a control, in other words.