Jump to content

Banner.jpg.39bf5bb2e6bf87794d3e2a4b88f26f1b.jpg

Askar ACL 200mm f/4 APO Camera Lens...Any good?


Recommended Posts

Hi Guys,

As the title says, are there many members on here who use this Lens and are the results good?

I've been pondering on buying this (along with many other things)¬†ūüėĄ ¬†for a while...I would be using it with modded 1100D and I also have a cooled mono cam.

Thanks in advance,

Mark :)

Link to comment
Share on other sites

11 minutes ago, Space Oddities said:

From what I've read, it seems to be a heavy, but very good lens. This topic on CN shows how sharp it is on a full frame sensor, so no doubt it will perform very well on an APS-C one!

@Uranium235  also might have some interesting insights to share as well, on top of what he already shared below! :) 

 

 

Cheers, thanks for that¬†ūüĎć

 

Mark

Link to comment
Share on other sites

The design looks superb, especially the fine focuser, also the 2" filter adapter is great for OSC cameras.  I use a Canon L 200mm F2.8 but I would seriously consider this lens as an alternative.  The Canon doesn't give a flat field on an APS chip.

Link to comment
Share on other sites

3 hours ago, MartinB said:

The design looks superb, especially the fine focuser, also the 2" filter adapter is great for OSC cameras.  I use a Canon L 200mm F2.8 but I would seriously consider this lens as an alternative.  The Canon doesn't give a flat field on an APS chip.

Thanks Martin,

Apart from the weight and price I'm torn between this Lens and the FMA180¬†ūü§Ē

 

Mark

Link to comment
Share on other sites

10 minutes ago, callisto said:

Thanks Martin,

Apart from the weight and price I'm torn between this Lens and the FMA180¬†ūü§Ē

 

Mark

Have you seen the FMA180 thread? I would say that the ACL200 is a little faster and better corrected. But the correction is solved by using a Astronomik L-3. The FMA180 is better value for money by a significant margin. Bit the ACL200 is better no doubt. 

Edited by Adam J
Link to comment
Share on other sites

7 minutes ago, Adam J said:

Have you seen the FMA180 thread? I would say that the ACL200 is a little faster and better corrected. But the correction is solved by using a Astronomik L-3. The FMA180 is better value for money by a significant margin. Bit the ACL200 is better no doubt. 

Thanks Adam,

Yeah I've seen the thread for the FMA180 and some videos....I don't know?

I'm going from one to the other and back again :boxing:

Link to comment
Share on other sites

I have the FMA180. Looking at some of the brightest stars in ACL200 images on Astrobin the halos seem to get further off centre the further out the bright stars are from the centre of the image.  This is not the case for the FMA180 and halos can be dealt with in post processing or, as AdamJ said, get the Astronomic L3 filter which does the cleaning up for you. 
One of my canon 650D modified images with the FMA180. 

359684D5-4E74-4FB9-9011-BB18FDE449CA.jpeg

Edited by PadrePeace
  • Like 1
Link to comment
Share on other sites

9 minutes ago, PadrePeace said:

I have the FMA180. Looking at some of the brightest stars in ACL200 images on Astrobin the halos seem to get further off centre the further out the bright stars are from the centre of the image.  This is not the case for the FMA180 and halos can be dealt with in post processing or, as AdamJ said, get the Astronomic L3 filter which does the cleaning up for you. 
One of my canon 650D modified images with the FMA180. 

359684D5-4E74-4FB9-9011-BB18FDE449CA.jpeg

Done!....I'll take that....The FMA180 it is then :icon_salut:

Thanks everyone for their views,

Mark :)

  • Like 1
Link to comment
Share on other sites

Posted (edited)

Well...that didn't work out as planned...just pressed the buy button for the ACL200¬†ūü§™¬† (a few glasses of spiced rum might have helped)

I'm sure it will perform well¬†ūüėĀ¬†

I'll let everyone know how I get on with it,

 

Mark

Edited by callisto
change wording
  • Haha 1
Link to comment
Share on other sites

Funny how that happens. You are the only one that has to be happy with the outcome so glad to help. Guess the extra F stops will be good for daytime shots as well. 

  • Thanks 1
Link to comment
Share on other sites

7 hours ago, PadrePeace said:

I have the FMA180. Looking at some of the brightest stars in ACL200 images on Astrobin the halos seem to get further off centre the further out the bright stars are from the centre of the image.  

 

It's most likely because they are reflections between the two inch filter and the rear most optical element of the ACL200. As opposed to filter reflections from the sensor. You tend to get that effect then a curved surface is involved. The filter on the FMA180 is infront of the objective so you will never see this effect as reflected light from the filter is sent back up into space. However when using the FMA with a filter wheel and mono camera I have seen this effect. But it's only on very bright stars to I am not bothered by it. 

Edited by Adam J
Link to comment
Share on other sites

  • 3 weeks later...

Hi,

 

I am quite happy for this little affordable lens. Below my first light, NGC7822 with SX694 mono. 2 hrs each SHO (10 min subs). Processed in pixisnght (stars have been reduced). Well corrected for this chip size, fast. One need to pay attention to get right focuse. Very well built lens. I did a quick test on RGB and it looks also good in RGB. Will try on APS-C later on. 

 

David 

 

 

Image182.jpg

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
√ó
√ó
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.