anyone own Apm 140 or 152mm ED Doublet

[Northernlight]

Just wondered if anyone is imaging with the Apm 140 or 152mm ED doublet scopes as i would like to get some owners feedback and maybe some links to images captured with either of these scopes.

[Davey-T]

I think the APM 152 may be the same scope as the Altair 152 and the Tecnosky 152 and probably other 152s. I seem to recall seeing pictures of the APM 152 and it looked identical right down to the focuser, I guess APM has a different doublet as it costs a whole lot more money than the others.

I have a Tecnosky 152mm  used mainly for solar imaging and visual night time stuff it's a pretty good scope with only a small amount of CA around the full Moon.

Dave

[Northernlight]

Thanks Dave,

Just curious how good or bad it performs for imaging and there aren't that many reviews out on the web.  I did however come across an old thread on cloudy nights which got quite heated discussing this scope with an batch of them that were sent to the usa which were about 10 users reported serious issues with the lens assembly and subsequently has issues with the supplier.

So not sure what to make of this scope.

[ollypenrice]

It's likely to be very different in broadband and narrowband for imaging.

Olly

[Northernlight]

Olly how do you mean ?  i have a cheap 102mm doublet and it seems to perform quite well as per the image below.

 

[ollypenrice]

Good colour correction is vital in broadband imaging. Poor control of blue is common and will affect both blue and luminance (which includes blue.) But if shooting through a NB filter you'll be shooting in almost monochromatic light so there is no need for good colour correction.

Olly

[Northernlight]

Thanks olly, now i see what you mean, hence why i get decent narrowband images using my 102mm doublet.