TELRAD FINDER CHARTS PDF

Blinker Pulser However, it works for me as is so far. The model, which I have purchased at GSSP star party have a simple proprietary 2 clamping screws base plate mount with double sticky foam strips at the front and back edges. So the installation is very easy but might seem kind of permanent. In addition, there are a couple of different size riser base attachments available on the market for Telrad see links above. Anyhow, it is wise to plan the installation first. You can easily try and consider different locations for your Telrad without sticking it to the OTA permanently using a piece of duct tape over the middle of the base mount for several prospective mounting locations while testing.

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Blinker Pulser However, it works for me as is so far. The model, which I have purchased at GSSP star party have a simple proprietary 2 clamping screws base plate mount with double sticky foam strips at the front and back edges. So the installation is very easy but might seem kind of permanent. In addition, there are a couple of different size riser base attachments available on the market for Telrad see links above.

Anyhow, it is wise to plan the installation first. You can easily try and consider different locations for your Telrad without sticking it to the OTA permanently using a piece of duct tape over the middle of the base mount for several prospective mounting locations while testing.

The location must be convenient for your particular telescope setup including its mount range capabilities and for your observing habits are you tall, short, using the ladder or stool, e. For example: The location right below the optical viewfinder may get into the way of using the later or will make the Telrad mirror or collimator lens prone to the fogging from your breath when using the finder. Bending over the OTA you may kick it in the process and have the object out of the view when back to the EP.

My choice is - on the side, below the EP, as pictured above the image is rotated, the optical finder is actually straight at the top of the OTA. I call it the "Bazooka targeting style". Also, I like changing my standing at the eyepiece position to sitting on my heels with knees on the closed cell foam pad for working with Telrad periodically. How to use it properly? There are Telrad overlays for paper maps available, but they cannot be adjusted to replicate the real thing well enough.

The secret of indirect pointing success with Telrad is in the dedicated pattern matching technique. Center the OI in the center of the smallest circle on the screen usually there is a button for that in the app. Tune the app to show only easy to see by the naked eye stars depends on your light pollution condition. Find these reference stars on the sky with your naked eye. If you cannot see them - try other reference stars farther from the target but no more than 2 outmost ring radiuses away.

Look through the Telrad and move the scope until its circles are sitting between reference stars exactly as on the simulated image see image below. I have the target object almost always dead center in the eyepiece field of view using just 2 reference stars in close proximity see notes below. Note: The perimeter markers of Telrad gaps in the circles are often not matching markers implemented by a software application developer usually a cross over the circles.

So it is possible to have some angle between real and virtual simulated markers. Software developers are usually aligning the cross with one of the coordinate grids polar or alt-azimuthal.

Therefore, at least 2 reference stars for the reliable pointing are necessary. I hope my request for such a feature changing marks angle in my favorite Astromist application will be implemented soon so I can use just a single reference star for pointing one day.

Update: It was never addressed, so I made my own app doing that, the DSO Planner , which is better in every regard anyway : So now I can use just a single star near the circles for precise enough pointing with my Telrad! The app is even taking care of leveling my chart and Telrad overlay with the true horizon, utilizing the gravity sensor.

Another great use for these gap-marks is working with the Dob near Zenith. Again the orientation of marks is crucial for that or getting used to their orientation relatively to the azimuth axis. Another cool solution could be found here.

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About this product

Write a Review and share your opinions! Rating max 5 : Great piece of kit. But never the Telrad until now. And I kick myself for not buying this one years ago. I shall use it along with my 9x50 finder which moves and needs realignment every time I set up.

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Telrad Finder

Telrad Reflex Finder for Telescopes Simple. I recommend anyone looking for a finder and has not yet been decided. Van W. The Telrad finder is the best, non magnifying finder tool for visually aiming any telescope on any mount. If you can see the object you can aim the telescope at it. There are a number of star chart references that use the Telrad bullseye image on the chart to help an astronomer find fainter objects.

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