astro-photo accessories

[kingkong]

hi all,

what do i need to attach my 1) Canon A70 & 2) Canon EOS to my sw102 f/5?

please explain in detail every single piece of adapter/ring/screw/nut i need to acquire.
i'm completely new in this so please bare with me :?

cheers.

[ChaosKnight]

Yo Kong! Going into astropornography so soon?

i can tell you what you need for the EOS, but for the A70, you are on your own.

First of all, you need a T-ring. A T-ring is a rather thick aluminium ring with internal and external screw thread. You have to remove the lens from your camera body, then use the external screw thread on the T-ring to screw it to your camera. T-rings' external threads are camera-specific. Use only EOS T-rings for EOS cameras.

Now you have a camera-t-ring assembly. You need another adaptor to attach it onto the focuser of your telescope. There are two types of adaptors i know of.

One is called a T-adaptor. It is a short tube threaded at one end. This end screws onto the internal thread of your T-ring. The other end is a 1.25" barrel. You can now insert the entire assembly into the focuser like a regular 1.25" eyepiece.

Another type of adaptor is for eyepiece projection. You can imagine this as something similar to a T-adaptor, except it is a much longer tube. This tube can hold an eyepiece inside. The image from the eyepiece is projected onto your film.

My advice is to get the second type of adaptor. Pop in an eyepiece and it's high-magnification eyepiece projection photography. Leave out the eyepiece and it's just prime focus. But with this, there may be problems with balancing your telescope.

Screws and nuts come with the adaptors.

It's a good idea to get a remote for the camera. You need to cut down on vibration. The flipping of the camera mirror is bad enough. Imagine using your hands to press the shutter.

My C102 has threads ready on the focuser, so i don't need a T-adaptor, only a T-ring. Check your focuser for such features that will save the need for adaptors.

[kingkong]

My C102 has threads ready on the focuser, so i don't need a T-adaptor, only a T-ring. Check your focuser for such features that will save the need for adaptors.

my sw102 focuser also has t-thread. so i need to buy a t-ring... where can i get those?
also, do i need a stepping ring? what size is the thread on the t-ring? and on the focuser?

[ChaosKnight]

Huh? What is a stepping ring?
If the thread on your focuser is similar to mine, right at the end of the focuser, likely the t-ring screws directly on it.

Anyway this is the t-ring you want:
http://www.telescopes.com/products/6046.html

[Airconvent]

hi all,

what do i need to attach my 1) Canon A70 & 2) Canon EOS to my sw102 f/5?

please explain in detail every single piece of adapter/ring/screw/nut i need to acquire.
i'm completely new in this so please bare with me :?

cheers.

analog camera adapter is good but troublesome.
since you have the A70, I suggest you consider the scopetronics option instead. it is simply an adapter that connects your camera to an eyepiece of your choice. you then place the combination into your scope for direct viewing through your eyepiece. the product is called a digi-t
I have checked and there is one for the A70.

you can get the info here : www.scopetronic.com

for local sale, you can check with samuel from harlequinastronomics who sells the scopetronic range.

this solution presents some vignetting which will affect large objects like the moon. if this is so, the more expensive Maxview40 is supposed to minimise this . The maxview is simply a digi-T adapter with 40mm eyepiece built in.

rich