 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| PhotoKB HomeDiscussion Groups Digital Photography Digital PhotoDSLR CamerasZLR CamerasPoint & Shoot CamerasFilm Photography 35 mmLarge FormatMedium formatDarkroomFilm and LabsOther EquipmentPhoto Technique Nature PhotographyPeople PhotographyTechnique GeneralGeneral Photo Topics General TopicsAustralian PhotographyUK PhotographyDirectoryPhoto Clubs |
Photo Forum / General Photo Topics / UK Photography / January 2004Qucik query on telephoto lenses and multipliers...
Just a sanity check for my tired brain... I'm looking at getting 300mm f4 EF prime lens (one of the IS / L models).... anyway part of my reason for this is:- 1. It's probably the biggest decent prime lens I can afford... 2. With a 1.4x extender I get a 420mm f4.5... 3. With a 2.0x extender I get a 600mm f5.6... Is this right or am I talking out my bum as usual... ;> -- Richard Horton "Users are like a virus, each causing a thousand tiny crises until the host finally dies..." http://www.solstans.co.uk http://www.photo.net/shared/community-member?user_id=861666 > I'm looking at getting 300mm f4 EF prime lens > 1. It's probably the biggest decent prime lens I can afford... > 2. With a 1.4x extender I get a 420mm f4.5... Obviously depending on which convertor you get, but more like f5.6/6 > 3. With a 2.0x extender I get a 600mm f5.6... No, f8 Alan.  SignatureTo reply by e-mail, change the 'minus' to 'plus'. http://www.dvatc.co.uk - Off-road cycling in the North Midlands. >> I'm looking at getting 300mm f4 EF prime lens >> 1. It's probably the biggest decent prime lens I can afford... [quoted text clipped - 6 lines] > No, f8 > Alan. Oh nuts. There goes my AF... What would people recommend as an affordable (IE below say £1500) long telephoto for photographing birds such as Red Kites (which tend to fly quite high and can't be approached too closely as they're protected)... Thanks, Richard. (My primary body is an EOS-30 - I may be upgrading to an EOS-3 at some point but not sure as I do like my 30 and would rather invest in lenses at the moment - only reason for an upgrade to the 3 at the moment would be the weather proofing). > >> I'm looking at getting 300mm f4 EF prime lens > >> 1. It's probably the biggest decent prime lens I can afford... [quoted text clipped - 19 lines] > moment - only reason for an upgrade to the 3 at the moment would be the > weather proofing). I don't know if it'll work on an EOS30 (it does on the digitals) but there is a trick where you insulate three of the contacts on the extender and the camera no longer knows it's there. AF is not disabled, although it will be less reliable if your effective max aperture is f8. If it's any use, the URL is http://www.fredmiranda.com/TipsPage/ - first entry. Alternatively not all 3rd party teleconverters disable Canon AF, althought the the point about it being less reliable at f8 still applies. Signatureregards, dslr >>> I'm looking at getting 300mm f4 EF prime lens >>> 1. It's probably the biggest decent prime lens I can afford... [quoted text clipped - 8 lines] > > Oh nuts. One stop = 2, half stop = square root 2 = approx 1.4. You have to multiply the aperture by the extender factor. > There goes my AF... 5.6 is doable. So a Canon 1.4 should just work. > What would people recommend as an affordable (IE below say £1500) long > telephoto for photographing birds such as Red Kites (which tend to fly > quite high and can't be approached too closely as they're protected)... Get a Canon EOS 300D or 10D. Gives you 1.6x magnification for free (because of the crop factor). Hi Richard, Another option would be attaching the camera to a spottong scope, as there are adapters available for slr's via T-2 mounts. While focusing may be an issue in certain situations, I expect that the majority of the time you would be at infinity anyway. I guess for more knowledge look up bird-watching threads/groups and even look out for a photo mag called Landscape Photography? Cheers, Stephen > >>> I'm looking at getting 300mm f4 EF prime lens > >>> 1. It's probably the biggest decent prime lens I can afford... [quoted text clipped - 22 lines] > Get a Canon EOS 300D or 10D. Gives you 1.6x magnification for free > (because of the crop factor). > Hi Richard, > [quoted text clipped - 6 lines] > I guess for more knowledge look up bird-watching threads/groups and even > look out for a photo mag called Landscape Photography? I did try looking into this option a while back but while I can find alot of information on digiscoping I can't find much on using a film camera with spotting scopes. I do know my EOS-30 might well have problems so my EOS-600 might well be called upon to try this but spending money on a spotting scope on the chance it might work isn't something i'm too keen on when my ideal setup is only around £1500 (A 100 - 400 IS or the 300l f4 + 1.4) -- Richard Horton "Users are like a virus, each causing a thousand tiny crises until the host finally dies..." http://www.solstans.co.uk |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.