depscribe's photos

In my testing of this very charming little lens, I found that in color there's no noticeable hotspot until one gets past f5.6. Which is good performance compared to a lot of other lenses. Shot in 720nm IR.

Actually, this is a test to see how well the 25mm f1.8 Meike lens works in infrared. (Answer: in black-and-white, up to f8, inclusive.) Shot in 720nm IR.

This was made with the old 85mm f2 AIS Nikkor that I bought used for $80 in November 1988. Its color rendering (this hasn't been corrected; only auto white balance and channel swap) has a kind of southwestern flavor, I think. The 85 Nikkor AIS lens has no hotspot that I could find.

The variation in color rendition among lenses is fascinating. This picture was made at 720nm, wide open (the old 50 f1.4 Nikkor has a noticeable hotspot beginning at f4). Only processing was in The GIMP: Auto white balance and red-blue channel swap. No correction at all.

And shooting under the trees over Federal Creek in rural Athens County, Ohio. Water does interesting things in infrared, no matter the light. 850nm

This is under the tree canopy on College Street in Athens, Ohio. 850nm

Here's a more open section of College Green. The trees are as always in 850nm infrared, but the sky doesn't go dark.

Very gray, low-contrast day with slight mist. While devoid of the normal infrared pop, the results were interesting. Here's Ohio University's College Green, with Cutlet Hall in the background. 850nm

The picture OOC was terrible, but the color slider in the GIMP changed things considerably. 850nm