#1  
Old 29-07-2015, 07:22 AM
bojan's Avatar
bojan
amateur

bojan is offline
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 5,966
Question about Tokina 300mm F4 AT-X

Anybody has AP images taken with this lens?
I am especially interested in performance in corners.. CA, coma etc.
Thanks in advance!
Reply With Quote
  #2  
Old 29-07-2015, 08:52 AM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
I used to have the tokina 300/2.8 and it was a ripper for astro when stopped down to 3.2..can't speak to the f/4 however they appear to be of similar mechanical quality so assuming the same of optical quality I'd say it should be ok. I wouldn't think it would be any good wide open though. Tokina lenses rarely are.
Reply With Quote
  #3  
Old 29-07-2015, 06:27 PM
AstroJason's Avatar
AstroJason (Jason)
Registered User

AstroJason is offline
 
Join Date: Oct 2012
Location: Sydney
Posts: 585
Bojan, try this site, Tony Hallas recommends it and it has some good data to help choose a lens before purchasing.
http://www.photozone.de/nikon_ff/755-tokina3004fx
It seems to show very good centre resolution at f/4 but improves to almost excellent stopped down to f/5.6 with the borders and extreme edges improving slightly. It does seem to suffer from CA which oddly, seems to worsen as you stop the lens down with 1.6 pixel width at f/4. No doubt the f/2.8 version would give you more room to move and enable you to shoot at lower f stops.

Hope that helps in some way.
Reply With Quote
  #4  
Old 29-07-2015, 07:47 PM
bojan's Avatar
bojan
amateur

bojan is offline
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 5,966
Thanks for the info guys..
So it seems this lens is quite similar to Canon 300mm F4 FD.. which I have and am partly happy with... see here: http://www.iceinspace.com.au/forum/s...ht=canon+300mm

BTW, external aperture is far superior to internal one re CA.

Last edited by bojan; 30-07-2015 at 06:07 AM.
Reply With Quote
  #5  
Old 29-07-2015, 08:57 PM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Brisbane, Australia
Posts: 6,708
Indeed. On camera lenses I have always found external aperture stops to be far superior in terms of quality and stellar profiles.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 03:35 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
OzScopes Authorised Dealer
Advertisement
Lunatico Astronomical
Advertisement
Meade Australia
Advertisement
NexDome Observatories
Advertisement
SkyWatcher Australia
Advertisement
Bintel
Advertisement
Celestron Australia
Advertisement
Astronomy and Electronics Centre
Advertisement