Jump to content

Recommended Posts

One example concerning the Summicron 23 (TL2, ISO 400, 1/1000s, f/9) - i like this combination.

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

  • Like 3
Link to post
Share on other sites

  • 4 months later...

Here is another evaluation.  Nothing shows up a lens's aberrations better than astrophotography.  Here one commonly uses a lens at maximum aperture or near it, and a poorly-corrected lens will quickly reveal its defects—flare, coma, CA, etc.—on those pristine little star points.

The 23mm Summicron is one of my favorite lenses for star-scapes.  There is a little bit of coma near the field edge, but it is minimal and counts as well-controlled, indeed. Here is an example of an unguided shot of the Northern Milky Way.  The green cast in the lower part of the image is from a photochemical reaction in the upper atmosphere.  Note the Andromeda galaxy in the lower right hand corner.  A keen eye—or I should say, an eye that knows what its looking for—will spot one of its companions just above.  (TL2, 23mm Summicron, f/2, 10 sec., ISO 3200.) This is quite a fine lens in my opinion.

 

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

  • Like 10
Link to post
Share on other sites

Advertisement (gone after registration)

35 minutes ago, bcorton said:

Here is another evaluation.  Nothing shows up a lens's aberrations better than astrophotography.  Here one commonly uses a lens at maximum aperture or near it, and a poorly-corrected lens will quickly reveal its defects—flare, coma, CA, etc.—on those pristine little star points.

The 23mm Summicron is one of my favorite lenses for star-scapes.  There is a little bit of coma near the field edge, but it is minimal and counts as well-controlled, indeed. Here is an example of an unguided shot of the Winter Milky Way.  The green cast in the lower part of the image is from a photochemical reaction in the upper atmosphere.  Note the Andromeda galaxy in the lower right hand corner.  A keen eye—or I should say, an eye that knows what its looking for—will spot one of its companions just above.  (TL2, 23mm Summicron, f/2, 10 sec., ISO 3200.) This is quite a fine lens in my opinion.

 

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

Thank you! 

Link to post
Share on other sites

You're welcome!

ERRATUM: I wrote above "Winter Milky Way," but should have written "Northern Milky Way. 'Caught the error too late to edit it. Apologies.

Edited by bcorton
Link to post
Share on other sites

14 hours ago, bcorton said:

You're welcome!

ERRATUM: I wrote above "Winter Milky Way," but should have written "Northern Milky Way. 'Caught the error too late to edit it. Apologies.

Easily corrected ;) 

Link to post
Share on other sites

  • 2 weeks later...

The 23 is supposed to be the better lens which is logical, given that the compromises of the design of the 18 are slanted towards compactness with acceptable quality.

Link to post
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
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...