Astromania Off-Axis Guider with Micro-Focusing - for Successful Astronomy Photos Without A Guide Scope
Electronics > Camera & Photo > Accessories > Telescope & Microscope Accessories > Telescope Accessories > Guiders & Wedges
About this item
- An off-axis guider is a brilliant invention. This device sits in the 2-inch focuser in front of the camera. A small prism directs a little light from the telescope into a separate tube - where your guide camera or crosshair eyepiece is attached. This makes it possible to instantly correcting any tracking errors during the extended period over which your camera is exposing the image - for perfectly round stars!
- The advantages: 1) lets you take beautiful astronomy photos with round stars. 2) for refractors, SCs, MAKs and RC telescopes. 3) off-axis guider only 24mm in overall length - very compact. 4) robust yet light. 5) 45mm optical transmission - full illumination, even with large chips. 6) micro-focusing - especially smooth helical focusing with 0.05mm accuracy. 7) 75mm of back focus.
- The connections: Easy to adapt - the Astromania off-axis guider has an M48 thread on the telescope side and an additional socket for 2 inch eyepieces. The accessory has three screws and a flat M48 adapter for connecting your camera. The advantage - you can rotate your camera at any time and find the optimum orientation for the astronomical object you are exposing.
- Exact micro-focusing with 10mm travel - for auto-guider or crosshair eyepiece: A small prism directs light into the control unit of your guider- into a 1.25-inch helical focuser. Now insert your auto-guider or a crosshair eyepiece. With the generous 10mm of travel allows you will find the optimum sharpness for your guide star. Impressive - this special helical focuser can be adjusted to 0.05mm using the super fine scale. So you can always find the precise focus point very quickly.
- With an off-axis guider, perfect astrophotography is virtually in your grasp. Long exposure photos require precise tracking, which is the specialty of this guider, making it one of the necessary tools for astrophotography. You will soon have the most beautiful astronomy photos in the bag!
Reviews
★★★★★
Verified Purchase
★★★★★
Verified Purchase
Finally get your guide camera focus to match your imager!
I have used other OAGs and this one excels because of the ability to get the guiding camera in focus once the imaging camera is focused. There are screws so that a guide camera such as the QHY5L can be position along its length, then the built-in helical focuser is used for fine adjustment. Beats buying a variety of skinny spacers and hour of fiddling! Sturdy and solid construction. I use it with 70mm and 127mm APOs with great success. Handles reducers and flatteners well.
★★★★★
Verified Purchase
I love it
so good so far
★★★★★
Verified Purchase
Well made quality product!
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Question & Answer
Question :
HOW Does this tilt?
Answer :
It doesn't really "tilt". You install it in the viewing chain which allows you to place a guiding camera onto it for astrophotography. You CAN "rotate" the guider around its' axis so that you get clearance from other things in the chain. If you're specifically asking about how the image is split, there is a very small Prism (mirror) in the tube that takes a small piece of the image coming through the telescope and reflects it 90° so the guiding camera can see.
Question :
Q: do you know if this fits a celestron sct telescope? i want to use it with a canon dslr camera.
Answer :
Yes and no, you will have to buy some adapters to get it to work properly, here is what I had to buy
1. William Optics SCT Thread Adapter for 2" Diagonal
2. Gosky M48 (Male) to M42 (Male) T2 Adapter for Astronomy Telescope
3. Astromania off axis guider (the nose piece that comes with the guider is not used)
4. Solomark Telescope Adapter T / T2 Female Thread 42mm to 48mm male M42 to M48
5. T ring for the camera you are using.
I am also using the Celestron focal reducer, The set up I have listed above gets me close to the required 105mm back focus for the Standard C8 XLT
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