Im running the 32bit version on a netbook, canon 300d camera and dslrfocus software for image capture. 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. Farpoint focus mask celestron 11 sct hyperstarfastar fits fastarhyperstar ready c11 scts. A tribahtinov mask for aiding collimation and focusing of schmidt cassegrain, ritcheychretien, and newtonian telescopes cytan299tribahtinov. Ever since, the bahtinov mask has been a necessary part of an imagers arsenal. Previously ive just used a bahtinov mask to get focus with dslr dso imaging and the canon utilities capture software imaging. 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. How to make and use a bahtinov mask lonewolf online. Provides best possible focus for both visual and astrophotography. 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. Two of them form an x shape, and another spike crosses it, forming a shape.
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. When precize focus is achieved the pattern becomes symmetrical. 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 grabber goes 64 bit and 32 bit update niels. Student software student software duval county public. 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. Bahtinov focus masks make focusing for astrophotography easy. We have not yet decided if we are going to do this.
Farpoint bahtinov telescope focusing mask for celestron 8 sct telescopes dropin focusing mask for 8 scts schmidt cassegrain telescopes. 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. Each of the fwhm figures are placed under the corresponding bahtinov mask image. This customizable design generates custom bahtinov masks, which are used to aid focusing telescopes during astrophotography. After reading many discussions and articles in web pages and forums i decided to build my own bahtinov mask. How to make bahtinov mask, pdf templates deepsky watch. Apt bahtinov aid focus problems discussions software. Select the farpoint fp410h version not this item for all new celestron scopes. 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. How does this mask work, and how did mr bahtinov get the idea to cut such a peculiar shape.
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. 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. The below center and right photos show sirius through the bahtinov mask. Just got an idea to try the bahtinov mask on my tair 3s telephoto lens on the cn forum. As the focus is adjusted, the center diffraction spike appears to move. Relativetothehartmannmask,the diffraction pattern created by the bahtinov mask allows for much more precise focus.
Fine focus and bahtinov masks ask craig stark labs. Technical support for parentguardian accounts, oneview, and focus call 9043487628 or email. 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. The bahtinov mask forms a long cross, composed of two diffraction spikes, centered on the bright object. From beginner telescopes to professional observatories, opt has it all. The spikea focusing mask astronomy technology today 61 the focus knob, the line will. Improve your astrophotography focus with a bahtinov mask. Bahtinov focus mask for older classic celestron 8 sct without fastar or hyperstar. Farpoint bahtinov focus mask for meade 10 sct bahtinov focus masks are the brainchild of pavel bahtinov, a russian amateur telescope maker and astronomer. Im running the 32bit version on a netbook, canon 300d camera and.
Lightweight, precision cnc cut, non flexing and with adjustable rubber tabs. It does not fit with the hyperstar or fastar camera installed. Farpoint bahtinov focus mask for celestron 8 classic sct. Creation of a bahtinov mask is very similar to that of the hartmann mask. The method is simple, very intuitive and the device has universally been named after the inventor. I no longer need to fiddle around and wonder, is this the best i can focus it. Focusing using bahtinov mask main sequence software. 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. A bahtinov mask creates diffraction spikes visible to the viewer, with each direction of slots in the mask corresponding to a spike. By using the site you are agreeing to our use of cookies. Farpoint bahtinov focus mask for astrophotography manufacturer part number fp410. 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. 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.
Later i gave a try to the hartmann mask with three triangle shaped holes, but it did not performed better for me. Small deviations from optimal focus are easily visible. B multiple parallel edges dont make multiple spikes, but just one spike, thick and bright. Using and making flyscreen bahtinov mask for focusing. Focusing tool for serious astrophotographers and those who care about their time and quality of astrophotos. Finally i chose bahtinov, and ever since then i always know when i managed to set the focus within the tolerance range. Continuing the discussion from focusing using bahtinov mask. This indispensable astrophotography tool is constructed from nearly indestructible abs plastic. The bahtinov mask was invented by russian amateur astrophotographer pavel bahtinov in 2005. One thing ive seen with all these focusing methods is the need to get fairly close to focus before they work. Although masks have long been used as focusing aids, the distinctive pattern was invented by russian amateur astrophotographer pavel bahtinov russian. The bahtinov mask is a device used to focus small astronomical telescopes accurately.
Bahtinov mask focusing feature backyardeos otelescope. Im looking for a bahtinov mask to use with these lenses. 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. See and buy bahtinov focusing masks at our hertfordshire uk based showroom or buy online. May 28, 2015 ive been having difficulty focusing to infinity with my canon 6d and samyang 14mm f2. Pop the mask in, calibrate the spikes, remove the mask, and there you have it. 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.
Does anyone have a vendor or manufacturer lead they can offer for buying one. The central spike moves left or right relative to the diagonal x spikes according to focus position. Telescope focus for beginners the bahtinov mask youtube. The method is simple, very intuitive and the device has universally been named after the. This indispensable astrophotography tool is constructed from nearly indestructibl. A tri bahtinov mask for aiding collimation and focusing of. Bahtinov focus mask for celestron 11 sct with fastar or hyperstar ready, fp412h 4. 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. A bahtinov mask is a focusing aid for astronomy in general, and astrophotography in particular. My pictures created since then are also looks sharper, there are more details on them, and the stars look. 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.
I have used the bahtinov mask feature and byes fwhm. 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. The fwhm figures were with the bahtinov mask in place, so are higher than would be the case without, but the method is shown. Aspikeaexample of the nowclassic bahtinov mask is shown in image1. 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 final image is a wider shot of the backyardeos software best focus in this sequence and placed in the centre of the group. Farpoint astro bahtinov focus mask for celestron 8 sct w. What i see in the image when im a long way away from focus is a collection of circles or doughnuts. Bahtinov focusing mask for 8 f10 telescope a4 printout, generated by tool. Farpoint bahtinov focusing mask for celestron 8 sct. I can say without reservation that the bahtinov mask is one of the easiest if not the easiest. Ive been using the frame focus live view function in bye, trying to get the fwhm value as low as possible.
Also when the problem occurs the mask angle is also shown incorrectly. Otelescope is canadas toptied telescopes and accessories store. The bahtinov mask is just a clever device that amplifies the effect a lot. Most if not all newer celestrons have fastar or they are fastar ready. Hartmann masks are cut either with circular or triangular holes. Farpoint astro bahtinov focus mask for meade 10 sct fp4. 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. Optimum focus is achieved when the middle spike is centered on the star and symmetrically positioned between the other two spikes. For focusing the image of a telescope, one can use a bahtinov mask. They are named after paul bahtinov, who developed the first designs. The bahtinov mask is a widely used tool that cleverly uses diffraction as a focusing aid. Also, a hartmann mask doesnt provide the precision of the spikea.
Precise focusing of telescopes and astrographs is critical to performing astrophotography. 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. It requires the capability to acquire 640x480 images. You are in focus when you make a symmetrical shape.
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