Times 2 converter F stops which way
Jan 3, 2013 06:51:12 #
oldmalky
Loc: West Midlands,England.
If I use a converter im told i will lose two F stops so if i normally use F8 on Aperture priority what would the setting be, thankyou.
Jan 3, 2013 07:00:48 #
oldmalky wrote:
If I use a converter im told i will lose two F stops so if i normally use F8 on Aperture priority what would the setting be, thankyou.
My understanding.
What is the aperture size of your lens i.e. 2.8, 5.6-6.5
If your lens was 5.6 this would drop to f/8 with a converter.
If f/8 it would go to f/16 with a converter.
Jan 3, 2013 07:06:59 #
So you will also lose auto focus, and take care as no9 matter how good 2x converters are the quality really drops, stick with 1.4
Jan 3, 2013 07:10:10 #
oldmalky
Loc: West Midlands,England.
Thanks for the reply, just had a look at the lens i am planning to use and it says 1.8 f=500mm.
Jan 3, 2013 07:12:10 #
oldmalky
Loc: West Midlands,England.
JR1 i only have a x2 and it is more of a try out than anything.
Jan 3, 2013 07:21:03 #
oldmalky wrote:
JR1 i only have a x2 and it is more of a try out than anything.
I have known of people stacking converters, although I only own a 1.4X so have never tried it.
Jan 3, 2013 08:55:03 #
JR1 wrote:
So you will also lose auto focus, and take care as no9 matter how good 2x converters are the quality really drops, stick with 1.4
Whether or not you lose auto focus depends on the compatibility of the teleconverter with the camera/lens you're using it on.
I have on my wishlist the Olympus teleconverter, and both the Olympus ones (1.4x and 2x) will autofocus with my E-5 camera and Zuiko lenses.
But, yes, bright light is almost a "must" as you lose 2 stops of light.
EstherP
Jan 3, 2013 09:09:06 #
oldmalky wrote:
Thanks for the reply, just had a look at the lens i am planning to use and it says 1.8 f=500mm.
Did you mean it is 1:8? Is this a mirror lens? If so it is already an f/8, non adjustable lens. Adding a 2x Teleconverter will give you an aperture of f/16. That means that it will usefull only in bright sunlight, pretty much. Trying to manually focus a lens at f/16 is very difficult because the image in the viewfinder will be dark...even in the bright sun.
Between the loss of image quality and the difficulty focusing, I'm not sure you will find this a very useful combination.
Just to answer your original question, your setting will become f/16 as nothing else is available.
Jan 3, 2013 11:48:58 #
oldmalky
Loc: West Midlands,England.
birdpix wrote:
quote=oldmalky Thanks for the reply, just had a l... (show quote)
When i started with digital I Knew nothing about F stops, iso.
white balance, in fact nothing, what i have picked up is mainly from here, the lens in question says Falcon 500mm ST-P f/8.0 On the lens itself it says 1.8, the x2 converter was again something I had read about and it turned out it was a Neewer the same people who I believe made the lens, If in your valued opinion i should not waste my time then so be it.
Jan 3, 2013 13:20:40 #
i have a minolta 200mm g lens, i have used a 1.5 and 2.0x together on a ff and croped sensor and still had auto focus.i get good images too.
2x converter
Jan 3, 2013 16:27:22 #
oldmalky wrote:
quote=birdpix quote=oldmalky Thanks for the repl... (show quote)
The Falcon is an off, off, off, brand and may even be made by Opteka. It is not a mirror lens but its maximum f/stop is f/8. It doesn't seem to have great reviews, when you can find them. It might be fun to play around with if you don't have much cash tied up in it. I wouldn't expect too much.
Maybe others on UHH that have had some experience with this lens can pipe up.
Jan 3, 2013 16:29:11 #
oldmalky wrote:
quote=birdpix quote=oldmalky Thanks for the repl... (show quote)
The Falcon is an off, off, off, brand and may even be made by Opteka. It is not a mirror lens but its maximum f/stop is f/8. It is a completely manual focus, stop down lens. It doesn't seem to have great reviews, when you can find them. It might be fun to play around with if you don't have much cash tied up in it. I wouldn't expect too much.
Maybe others on UHH that have had some experience with this lens can pipe up.
Jan 3, 2013 17:57:24 #
oldmalky
Loc: West Midlands,England.
birdpix wrote:
quote=oldmalky quote=birdpix quote=oldmalky Tha... (show quote)
Like I said I bought this lens without knowing a thing about good lens or bad,I have tried it and it wasnt to bad (it was an overcast day) so i will be trying it again,I dont take bad pics but i really do not know a great deal about photography. Thanks for your input.
oldmalky
Jan 4, 2013 04:59:29 #
oldmalky wrote:
quote=birdpix quote=oldmalky quote=birdpix quo... (show quote)
"I dont take bad pics but i really do not know a great deal about photography."
That is a bit of an inflammatory statement; best thing to do is post images and let your peers do a critique and follow their suggestions for improvement. But on the other-hand you may really take brilliant images in which case we can all learn from the experience.
Jan 4, 2013 05:16:16 #
Your 500mm lens is a "preset" aperture lens, meaning whatever aperture you set (between f-8 and f-32) you are still looking through your camera at f-8 until you turn a ring on the lens to stop it down to your "preset" aperture. With the 2X tele-converter f-8 will become f-16, f-11 will become f-22, etc. Your camera should compensate for this change automatically by setting a lower shutter-speed. You should use a tripod for best results. At 500mm you're getting roughly a 10X magnification, so at 1,000mm you'll be at roughly 20X.
I wouldn't discourage you from experimenting with it, it's not like you're going to have any sort of $$ investment in film, or developing and stuff. Why not have some fun, and perhaps a learning experience!
I wouldn't discourage you from experimenting with it, it's not like you're going to have any sort of $$ investment in film, or developing and stuff. Why not have some fun, and perhaps a learning experience!
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.