--- product_id: 100719038 title: "Farpoint Bahtinov Masks for Camera Lenses (77mm)" brand: "farpoint" price: "€ 0.49" currency: EUR in_stock: false url: https://www.desertcart.nl/products/100719038-farpoint-bahtinov-masks-for-camera-lenses-77mm store_origin: NL region: Netherlands --- # Farpoint Bahtinov Masks for Camera Lenses (77mm) **Brand:** farpoint **Price:** € 0.49 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Farpoint Bahtinov Masks for Camera Lenses (77mm) by farpoint - **How much does it cost?** € 0.49 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/100719038-farpoint-bahtinov-masks-for-camera-lenses-77mm) ## Best For - farpoint enthusiasts ## Why This Product - Trusted farpoint brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Farpoint Bahtinov Masks Are one of the best tools for manually focusing your telescope available to astrophotographers. In 2005, Pavel Bahtinov, a Russian amateur telescope maker and astronomer detailed a new way to easily focus your DSLR, CMOS or CCD camera for astrophotography by adding a mask that matches the diameter of your telescope.Bahtinov mask are a less expensive method of getting focus on objects in the night sky compared to a standard motor focuser. With the right mask and setup it's easy to get crystal clear focus on a star in less than 90 seconds. How it WorksThese mask will work equally as well on the end of a scope or on the end of a dew shield on top of that the mask itself does not need to be perfected centered on the scope this is due to the angle of the slits themselves. Select a bright star as your guiding object. Place the Bahtinov focusing mask on your telescope's lens and secure it into place using the rubber tabs. The slits in the mask design create a set of diffraction spikes on the star that will assist in the accuracy of your focus. It will appear on your screen or computer as an "X" with a line through the center (when in focus). The diffraction spike pattern from a bright star using a Bahtinov mask As you adjust the focuser of your telescope, the central spike will move in and out of the X-pattern. If you are using capture software be sure to compensate for the lag time between exposures on the screen, typically 4-5 seconds. The same process applies using Live view display on your DSLR camera. Who We areWe at Farpoint Astro are a California based manufacturer of astrophotography filters, scopes, and tools. Our Bahtinov masks are the highest quality in the Astronomy Space. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BLVQ0KU | | Best Sellers Rank | #34 in Camera Lens Infrared Filters | | Brand | Farpoint | | Coating Description | Multi Coating | | Compatible Devices | DSLR cameras, telescopes | | Customer Reviews | 4.2 4.2 out of 5 stars (98) | | Enclosure Material | rubber | | Exposure Control Type | Manual (M) | | Item Dimensions D x W x H | 3"D x 3"W x 0.1"H | | Item Dimensions L x W | 3.03"L x 3.03"W | | Manufacturer | Farpoint Astronomical Research | | Manufacturer Part Number | FP438Series | | Media Type | ProductImage | | Model Number | FP443 | | Photo Filter Size | 7.7 centimeters | | Screen Size | 7.7 centimeters | | Special Effect | Skylight, Ultraviolet | | Thread Size | 7.7 centimeters | | UPC | 022099907114 | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** Farpoint - **Coating Description:** Multi Coating - **Material:** rubber - **Photo Filter Effect Type:** Skylight, Ultraviolet - **Photo Filter Size:** 7.7 centimeters - **Photo Filter Thread Size:** 7.7 centimeters - **Product Dimensions:** 3.03"L x 3.03"W - **UPC:** 022099907114 - **Water Resistance Level:** Not Water Resistant ## Images ![Farpoint Bahtinov Masks for Camera Lenses (77mm) - Image 1](https://m.media-amazon.com/images/I/91vvef13urL.jpg) ## Questions & Answers **Q: I am obviously not allowing for long enough exposures. all i get is a black sky! what iso should i use and how long should my exposures be?** A: Obviously, your exposure time depends on the ISO and f-stop you select and lens. Higher ISO's allow shorter exposure times with some loss in quality. Smaller f-stop (wider apertures) also allow shorter exposure times. An example, shooting meteor showers using a 14-24mm f2.8 zoom lens I used 15 sec exposure at f2.8 and ISO 1000 with a Nikon D850. For astrophotography, you need to adjust the times to minimize stars appearing to smear, if that is not an effect you desire. Search online for astrophotography or night sky photography for more hints. But try a range of exposure conditions to see what gives you the photos you want. **Q: Will this work on the canon 24-105 f4 if i purchase this also amazonbasics uv filter ??** A: Hi Jerry, I do use my Bahtinov Focusing Mask, 77mm, snapped into a basic 77 mm UV Filter on most of my Astro lenses. It works great, easy to use, and the focus is sharp. Try using a Rubber Band on the Zoom lens to prevent the Zoom lens from creeping movements. The Bahtinov Focusing Mask should work just fine on your Canon 24-105 f4 lens. Calibrate all of your lenses with your camera bodies. **Q: Do I have to use a filter to get this to connect properly?** A: the FP443 does not need a filter to help with connection. **Q: Can u put this on a dslr lens and the hood, or is it 1 or the other?** A: A Bahtinov focus aid come in various sizes, can be used on any lens (DSLR, Mirrorless, Telescope) and is used for night astrophotography. This size (77mm) fits my lenses. The way I use it is to mount it in a UV filter and gently screw it onto my lens to focus the lens on a bright star. Once the focus is set, remove the Bahtinov mask and filter you mounted it to so you can take your photos. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nl/products/100719038-farpoint-bahtinov-masks-for-camera-lenses-77mm](https://www.desertcart.nl/products/100719038-farpoint-bahtinov-masks-for-camera-lenses-77mm) --- *Product available on Desertcart Netherlands* *Store origin: NL* *Last updated: 2026-10-09*