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Nikon 18-200 f/3.5-5.6G ED-IF AF-S DX
A magic combination on my particular D70—used 90% of the time. Though its absolute performance is lacking at some focal lengths, its high focus accuracy(minimal backfocus)in infrared makes it an excellent quick-shot lens.
Nikon 18-200 f/3.5-5.6G Hot spots
Hot spots are visible, but in practice have not proven to be a problem, usually being easily masked by the subject matter. Only at the wide end (18mm) for subjects with a uniformly dark center do hot spots become an issue.
Nikon 18-200mm f/3.5-5.6 DX backfocus
Excellent backfocus performance, disappearing near 200mm. Unlike most zooms, backfocus is worst at the wide end, improving as the lens is zoomed towards the tele end. Strangely, the 18mm stetting yielded the strongest backfocus, but this image taken at f/3.5 belies the measured error, being quite sharp. Of course, moving subjects have a way of moving in or out of focus once focus is locked.
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Diglloyd Infrared Photography covers cameras and lenses for infrared photography.
The coverage explains all the issues involved in shooting for monochrome and in infrared. It is not a review of any particular camera or lens, though many examples are included.
- Monochrome vs color cameras.
- Post processing for monochrome.
- Guidance on workflow for infrared, including black and white and channel swapping for false-color images.
- How infrared renders, and why certain spectral cutoffs matter: false color vs black and white.
- Image quality issues to be on the lookout for in infrared.
- Numerous lens evaluations in infrared.
View an overview of infrared as well as filter spectral transmission plus examples from an optimal lens.