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UV Lens test – IDS2e (page 4)

As the previous tests took quite a while to do, I decided to only shoot 3 different 35mm F3.5 lenses to compare their ability to shoot extended spectra images incorporating both UV and some visible light (blue & green).

It would be logical to conclude that if a lens has focus shift between visible light and UV, that it will impact on the ability of that lens to produce a sharp image when light from both spectra are present in the image; as the light will not focus at the same point in the image. The question is whether this will be apparent in the images shot.

Here are the results from Aico 35mm F3.5 old version enlarger lens, Kuribayashi 35mm F3.5 and Soligor 35mm F3.5 9xxxxx series. Images were shot at F4 and then at F8, so there can be a comparison at larger and smaller apertures.

Aico 35mm F3.5 old version enlarger lens IDS2e @ F8
Aico 35mm F3.5 old version enlarger lens IDS2e @ F4
Aico 35mm F3.5 old version enlarger lens IDS2e @ F8
Aico 35mm F3.5 old version enlarger lens IDS2e @ F8
Kuribayashi 35mm F3.5 IDS2e @ F4
Kuribayashi 35mm F3.5 IDS2e @ F4
Kuribayashi 35mm F3.5 IDS2e @ F8
Kuribayashi 35mm F3.5 IDS2e @ F8
Soligor 35mm F3.5 9xxxxx series IDS2e @ F4
Soligor 35mm F3.5 9xxxxx series IDS2e @ F4
Soligor 35mm F3.5 9xxxxx series IDS2e @ F8
Soligor 35mm F3.5 9xxxxx series IDS2e @ F8

Summary of extended spectra imaging:

These three lenses are useable at F4 and also when stopped down for extended spectra imaging. Being able to shoot at larger apertures can be useful particularly for videos where shallower depth of field is required or maximum light transmission to the sensor so lower ISOs can be used.

Boon

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