The method is simple, very intuitive and the device has universally been named after the inventor. When precize focus is achieved the pattern becomes symmetrical. A bahtinov mask is a focusing aid for astronomy in general, and astrophotography in particular. Bahtinov mask focusing feature backyardeos otelescope. Ive been using the frame focus live view function in bye, trying to get the fwhm value as low as possible. After reading many discussions and articles in web pages and forums i decided to build my own bahtinov mask.
Fine focus and bahtinov masks ask craig stark labs. No matter which type of camera you use, a bahtinov mask can help you achieve a higher level of accuracy when focusing your telescope or a camera lens. For focusing the image of a telescope, one can use a bahtinov mask. Apt bahtinov aid focus problems discussions software. In 2008, pavel bahtinov, a russian amateur telescope maker and astronomer, created a great new way to easily focus a dslr camera, webcam, or ccd camera for astrophotography. Unlike a hartmann mask which provides no visual cues on the direction of travel needed for focusing, the spikea mask is a bahtinov mask which clearly shows the direction of travel needed to achieve focus.
Lightweight, precision cnc cut, non flexing and with adjustable rubber tabs. Technical support for parentguardian accounts, oneview, and focus call 9043487628 or email. Whether youre doing planetary visual observing, planetary imaging, or deep sky imaging, the bahtinov mask is a great accessory to get the best focus for your telescope quickly and easily. By using the site you are agreeing to our use of cookies. They are named after paul bahtinov, who developed the first designs. Im running the 32bit version on a netbook, canon 300d camera and dslrfocus software for image capture. A bahtinov mask creates diffraction spikes visible to the viewer, with each direction of slots in the mask corresponding to a spike. May 28, 2015 ive been having difficulty focusing to infinity with my canon 6d and samyang 14mm f2.
Im running the 32bit version on a netbook, canon 300d camera and. This indispensable astrophotography tool is constructed from nearly indestructible abs plastic. We have not yet decided if we are going to do this. This indispensable astrophotography tool is constructed from nearly indestructibl. Provides best possible focus for both visual and astrophotography. Student software student software duval county public. The bahtinov mask was invented by russian amateur astrophotographer pavel bahtinov in 2005. Precise focusing of telescopes and astrographs is critical to performing astrophotography.
In 2008 an amateur telescope maker and astronomer ppublished an ingenious new way to easily focus your dslr, webcam or ccd camera for taking astrophotos. At times when visually the focus looks correct the one of the overlayed lines shown in the software is way off and can jump between two places. Bahtinov focus mask for older classic celestron 8 sct without fastar or hyperstar. Does anyone have a vendor or manufacturer lead they can offer for buying one. Unlike autofocus and star measuring software tools, this old school method can be done without the use of an external computer, and only takes a minute. As i had in mind 3d printing of the front camera attachment for the solar filter anyway, i decided to print the mask instead of just an ordinary ring as i usually do in order to get the perfect snug fit.
Later i gave a try to the hartmann mask with three triangle shaped holes, but it did not performed better for me. A tribahtinov mask for aiding collimation and focusing of schmidt cassegrain, ritcheychretien, and newtonian telescopes cytan299tribahtinov. If you do not have a bahtinov focus mask, get one, it will ensure you have the best focus possible, regardless of the seeing conditions. I have used the bahtinov mask feature and byes fwhm. Farpoint bahtinov focus mask for meade 10 sct bahtinov focus masks are the brainchild of pavel bahtinov, a russian amateur telescope maker and astronomer. Ever since, the bahtinov mask has been a necessary part of an imagers arsenal. How to make and use a bahtinov mask lonewolf online. What i see in the image when im a long way away from focus is a collection of circles or doughnuts.
Bahtinov focus masks make focusing for astrophotography easy. This customizable design generates custom bahtinov masks, which are used to aid focusing telescopes during astrophotography. The bahtinov mask is a device used to focus small astronomical telescopes accurately. My pictures created since then are also looks sharper, there are more details on them, and the stars look.
How does this mask work, and how did mr bahtinov get the idea to cut such a peculiar shape. The bahtinov mask forms a long cross, composed of two diffraction spikes, centered on the bright object. It does not fit with the hyperstar or fastar camera installed. Continuing the discussion from focusing using bahtinov mask. Farpoint fp410 bahtinov focus mask celestron 8in sct. Focusing tool for serious astrophotographers and those who care about their time and quality of astrophotos. Its an elaboration on the idea of a hartmann mask something you stick over the front end of your scope to induce a diffraction pattern that makes focusing easier. I also have a celestron c8 and motofocus jmi, and you know the final approach to the focus in c8 to be done in an anticlockwise to compensate for gravity. As the focus is adjusted, the center diffraction spike appears to move. The bahtinov mask is a widely used tool that cleverly uses diffraction as a focusing aid. Farpoint bahtinov telescope focusing mask for celestron 8 sct telescopes dropin focusing mask for 8 scts schmidt cassegrain telescopes. The bahtinov mask is the simplest, cheapest telescope focusing aide out there.
Improve your astrophotography focus with a bahtinov mask. Farpoint astro bahtinov focus mask for celestron 8 sct w. Bahtinov grabber goes 64 bit and 32 bit update niels. I made a simple program that detects the three lines of the bahtinov pattern and tells you how far the central line is from the crossing of the diagonal lines. Farpoint bahtinov focus mask for celestron 8 sct whyperstar bahtinov focus masks are the brainchild of pavel bahtinov, a russian amateur telescope maker and astronomer. The bahtinov mask is just a clever device that amplifies the effect a lot. The central spike moves left or right relative to the diagonal x spikes according to focus position. Farpoint focus mask celestron 11 sct hyperstarfastar fits fastarhyperstar ready c11 scts. In 2008 an amateur telescope maker and astronomer published an ingenious new way to easily focus your dslr, webcam or ccd camera for taking astrophotos. Please note if your child has ever been enrolled in a duval county public school including. From beginner telescopes to professional observatories, opt has it all.
It consists of a disk made of opaque material fitted over the telescope objective with slots cut out in a specific pattern devised by. The method is simple, very intuitive and the device has universally been named after the. Achieving focus has been a tough challenge since i began with astrophotography, so i decided to do something serious about it, preferably something that does not cost a lot of money. Bahtinov focus mask for celestron 11 sct with fastar or hyperstar ready, fp412h 4. Im looking for a bahtinov mask to use with these lenses.
Two of them form an x shape, and another spike crosses it, forming a shape. Aspikeaexample of the nowclassic bahtinov mask is shown in image1. Using and making flyscreen bahtinov mask for focusing. Farpoint bahtinov focusing mask for celestron 8 sct. Optimum focus is achieved when the middle spike is centered on the star and symmetrically positioned between the other two spikes. Each of the fwhm figures are placed under the corresponding bahtinov mask image. Otelescope is canadas toptied telescopes and accessories store. The below center and right photos show sirius through the bahtinov mask. Telescope focus for beginners the bahtinov mask youtube. Just got an idea to try the bahtinov mask on my tair 3s telephoto lens on the cn forum. One thing ive seen with all these focusing methods is the need to get fairly close to focus before they work. Creation of a bahtinov mask is very similar to that of the hartmann mask. The final image is a wider shot of the backyardeos software best focus in this sequence and placed in the centre of the group.
Farpoint bahtinov focus mask for astrophotography manufacturer part number fp410. The spikea focusing mask astronomy technology today 61 the focus knob, the line will. Previously ive just used a bahtinov mask to get focus with dslr dso imaging and the canon utilities capture software imaging. Although masks have long been used as focusing aids, the distinctive pattern was invented by russian amateur astrophotographer pavel bahtinov russian. See and buy bahtinov focusing masks at our hertfordshire uk based showroom or buy online. Dcps traditional schools, charter schools, duval virtual instructional academy, home school, mckay school, empowerment scholarship school, vpk, child find ese services, andor teen parent services they will have a student id. Bahtinov focusing mask for 8 f10 telescope a4 printout, generated by tool. B multiple parallel edges dont make multiple spikes, but just one spike, thick and bright. Focusing using bahtinov mask main sequence software. Also, a hartmann mask doesnt provide the precision of the spikea. Also when the problem occurs the mask angle is also shown incorrectly. This focus mask type is the only one that does not use diffraction and are best suited for gross focus adjustments as smaller discrepancies can be difficult to detect.
Apt has a function called bahtinov aid based on bahtinov grabber technology and it provides an excellent visual and digital reference when using a bahtinov mask to come to focus. Finally i chose bahtinov, and ever since then i always know when i managed to set the focus within the tolerance range. Most if not all newer celestrons have fastar or they are fastar ready. If you get a deadon polar alignment, and focus then on a near by bright star, using the fwhm feature is really superior to the bahtinov mask. How to make bahtinov mask, pdf templates deepsky watch. Farpoint bahtinov focus mask for celestron 8 classic sct. I no longer need to fiddle around and wonder, is this the best i can focus it. I was playing around with thisonline bahtinov mask generator but when i input the parameters for my camera lens say the sony zeiss 24mm f1. Hartmann masks are cut either with circular or triangular holes. Here, ill show a video of me using both the current version of the fine focus tool and augmenting this with the use of a bahtinov mask.
Small deviations from optimal focus are easily visible. Of the two i have come to prefer the full width half maximum fwhm feature of bye. A tri bahtinov mask for aiding collimation and focusing of. Select the farpoint fp410h version not this item for all new celestron scopes. Pop the mask in, calibrate the spikes, remove the mask, and there you have it. The fwhm figures were with the bahtinov mask in place, so are higher than would be the case without, but the method is shown. I can say without reservation that the bahtinov mask is one of the easiest if not the easiest. It requires the capability to acquire 640x480 images. Farpoint unmounted bahtinov mask for 77mm camera filter. Farpoint astro bahtinov focus mask for meade 10 sct fp4. Relativetothehartmannmask,the diffraction pattern created by the bahtinov mask allows for much more precise focus. You are in focus when you make a symmetrical shape. The slots are angled in such a way that they create a diffraction pattern with 3 spikes in an x when aimed at a point light source.
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