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Star Adventurer OTA

Coastliner

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Coastliner

Coastliner

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Hi All,

I have the Skywatcher Star Adventurer portable EQ mount and was wondering if any of you have used one of these with a small OTA? I also have a Nexstar 4 and was thinking of using the ota off that, but with a dslr attached I think I might be pushing the weight limit which I believe is 5kg.

I have the "Astronomy pack" which includes the counterweight.

I would like to use the ota for dslr photography with long exposures (a couple of minutes or so), and I think I might like to go for a refractor this time, being the owner of a couple of reflectors, unless you have other ideas.

I have successfully used the mount with the dslr directly attached and have achieved some reasonable results.

I don't have a massive budget btw!

Cheers,

Neil.

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Coastliner

Coastliner

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If I knew how to delete this I would: total brainfade, I've asked this before!

Ah well, any updates, any new kit come out, or would the Starwave 70 ED still be a good bet? Would it be significantly better than using my 70-300 Canon zoom lens?

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skysculptor

skysculptor

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Small ota would be fine I use an st80 plus canon 550d on mine with no problems! A starwave 70ed plus DSLR body would only weigh around 3kg so would be ok I recon! Sw star adventuer is rated a 5 kg but that's prob for visual so if you want to image with it I guess upto around 3 kg with good balance and counterweight would prob be fine at its limit but ok! Your polar aligning would have to be spot on mind!

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skysculptor

skysculptor

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Yep that's the one! To fair it's not an imaging scope it has a lot of CA and distortion ! Not being an apo scope But it good to learn with and with a bit of practice and a few tweaks to it lens edge blackening etc it possible to get some usable results! And if n when you upgrade to a better scope you'll have useful experience and will get better results with your new gear! Yes the image will be bigger than from a 70- 300 because an st80 has a focal length of 400 mm f5 so with a crop sensor body your getting around 600 mm ish depending on your exact crop ratio 1.6 on canon 1.5 on Nikon If I remember correctly!

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Coastliner

Coastliner

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Thanks for that, in view of the CA problems (I'm just looking at Youtube now, learning about the tweaks ) I'm wondering whether I should stump up the cash and get a better quality scope to start off with. As i understand it, I should go for an Apochromatic rather than an Achromatic - have I got that right? Or maybe I'm fussing too much! Is there a decent, light, Apo that would work with the Star Adventurer?  I'm probably going to scare myself with the price now!

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Coastliner

Coastliner

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This is starting to go a little over my head - 7.5 x 400:  where does the 400 come from? My zoom lens is 70-300? And the 7.5 - where does that come from?

Don't worry, I'm not asking for a full explanation on here! Point me to a webpage!

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