Gerry Casa Christiana

Well I've just had a nightmare with Altair Astro just trying to buy one of their guide scopes. 2 weeks nothing! Very disappointed I cancelled the order today so now I need to look for somewhere else to get a decent guide scope. I'm also going to be involved in a observatory build. They lost out there. 

So guys and girls. What can I do now? 

Just so you know what I've got. Skywatcher 150pds which is 750 focal length on a Eq6.  I already bought the ASI 120mm so I just need a guide scope!

Shame FLO don't have other options. 

Any ideas will be gratefully received. Maybe they did me a favour if I can get something better. 

Gutted. 

On 25/03/2017 at 11:59, iapa said:

Just found another note I have

the ratio of pixel scale for each camera/tube < 4

the pixel scale is

pixel size (in micrometers)/focal length (mm) * 206.3

so, in my case using the Orion with a QHY6,and a canon 600d with the 200P-DS

6.5/162*206.3 = 8.2 arcsec / pixel for guider

4.3/900*206.3 = 0.99

ratio come out as 8.4 so, not to good.

Replace the Orion with the Startravel 80 and the ration come out to 3.4

or, replace the QHY6 with a ToupTek Mono (1280*960, 3.75mm pixel size) the ration is 4.84

 

If we use the Canon 600d, on your 150P-DS, and the Orion with the ToupTek camera

the ration is 3.63, which is likely to be manageable.

You've not mentioned which cameras you are using, or planning to use.

I've a spreadsheet I set up to a do a whole range of cal cautions for different gear - worth the effort.

Sorry,I keep scraps, my handwriting is abysmal, so rarely note URLs etc.

Hi I still haven't bought a autoguider! I have a Skywatcher 150pds and Canon 550d. So I want the best option for this really. You lost me on the technical stuff but if you could explain I'll work it out. 

Cheers

Gerry

Great. Do we need to post the images here in this post?

54 minutes ago, Tuomo said:

I think rule of a thumb is something like: guide scope focal lenght should be about third of imaging scope FL. I think guide scope FL is about 160mm...

So that being the case then the Orion is not ideal. So I'm looking for something around 250mm FL then? For the camera? Any suggestions? What works well for people?

Thanks

Gerry

Hi 

Can I ask about a autoguider. I have a skywatcher 150 pds 750 focal length. Is there anything I need to know for a autoguider when it comes to focal length of the telescope? For example could I use a Orion 50mm mini with mine? Or do I need a larger guide scope. Just don't want to spend money and buy the wrong one! 

Thanks! 

Gerry

On 10 March 2014 at 18:38, HenryW said:

Not great pics from me, but this is what i got so far since beginning with AP in august this year. No guiding and maximum time of expousures 30 sek.

Please can you confirm you did these on a EQ5!!!! I'm just in the process of buying a telescope. Great pictures