Pro-grade ultra wide angle lens.
See also Canon RF 14-35mm f/4L and
Canon mirrorless wishlist
64GB, Intel Core i9 8-core, 2TB SSD
Refurbished, OWC warranty.
√ Same machine Lloyd uses!
(add $300 for 128GB memory)
More used desktop and laptop Macs...
Filter—Baader Venus Ultraviolet Pass
Related: filters, infrared, spectral transmission, ultraviolet
Graphs are in nanometers. Visible light is approximately 390 - 650 nm (the human eye can see very weakly into the 700-800nm range). Graphs used by permission of Coastal Optical System.
A great source for filters at competitive prices is B&H Photo. Get filters at B&H Photo.
At first glance, the original “Venus I” filter doesn’t seem much different than the Venus II filter. Yet field reports from ultraviolet shooters indicate that the infrared-blocking performance of the Venus II is much improved.
Notice the “bump” near 780nm on the Venus I which is not present on the Venus II; this is the source of the infrared contamination that is so disliked— there is often many times more infrared present than ultraviolet, so even a small leak can overwhem the UV image.