Gerd Neumann Bahtinov Mask for 52mm Filter Thread
Gerd Neumann has created Bahtinov masks for DSLR and SLR astro-photographers! Made to fit the 52mm filter threads of your photographic lens, using a Bahtinov mask is quick and easy. You'll achieve perfect focus every time!
Perfect focus is extremely important, particularly for the astrophotographer. Even a slight digression from perfection can result in blurry or lopsided stars. Out of all of the focusing tools available on the market, often times the best ones are the most simple. The Bahtinov mask, named after its creator, Pavel Bahtinov, is a grid that is placed over the front of your telescope or lens. A specialized pattern of straight slots, running parallel to one another creates a helpful pattern of bright spikes that will radiate out from a focus star. You know you are in focus when those spikes meet at their center and form a symmetrical star-burst type shape.
Gerd Neumann's Bahtinov masks use a very large number of slots compared to other masks allowing much more light to reach your camera sensor therefore allowing you to use a larger array of stars for focusing. On a very bright star and while using a DSLR in live view mode, you can focus very easily. Simply attach the mask to the front of your lens, aim yourself at a bright star of your choosing, turn your camera on and go into a live view mode. Focus until you've achieved a symmetrical pattern and remove the mask. You're now ready to capture a perfectly focused image!
GNJ Bahtinov masks are made from black coated aluminum to maintain a light weight but lasting durability with the ability to be threaded directly into a photographic lens. Unlike homemade cardboard masks, pattern edges stay sharp and intact and are precision-laser cut.
- Additional Information
SKU GN-BM-M52 Manufacturer Gerd Neumann Focuser Design Bahtinov - Grid Focuser or Mask Size 0" - 3" Mask Focus Control Manual
- Included Items
- 52mm Gerd Neumann Bahtinov Mask
- Questions & Answers
Product QuestionsDoes this mask thread onto the lens? If so, how do you prevent altering focus when you unthread the mask? When pinpoint star size is involved, DSLR lens focus is sensitive to a millimeter of rotation.Question by: Tim Geib on Oct 4, 2015 7:42:00 AMHello Tim,
Thank you for your question. This mask indeed has threads so you can thread this onto a 52mm lens. The best way to prevent any kind of shift when you unthread this is to switch the lens to autofocus mode (On canon lenses, this engages the lens to the autofocus gear so it becomes harder to move it out of focus. On some other lenses, autofocus mode disengages focus gears altogether so the lens will not move out of focus). You would then use your fingers to hold the end of the lens before the border of the threaded mask so that focus stays in position while you unthread the mask.Answer by: Rod Gallardy (Admin) on Oct 4, 2015 4:29:00 PM
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