RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
But if you want to use the 200mm with this converter, it's usually for long distance shots, isn't it (that's at least what I should do). So there is a lot of focussing at infinity. That should be okay. But its possibly harder to get a great composition. That should be the price one pays. Hans b. -Oorspronkelijk bericht- Van: Keith Whaley [mailto:[EMAIL PROTECTED] Verzonden: woensdag 17 september 2003 13:57 Aan: [EMAIL PROTECTED] Onderwerp: Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price? Fred wrote: > > > ...you'll have the equivalent of a f16 400mm with any if these > > converters > Well, a 2X TC used with a K 200/4 would give you 400mm at ~f/8~ > (but, of course, you would then usually stop down, if possible). > > Fred That's one of the real problems with TCs, isn't it. If you need the sharpness of your prime lens, which is usually best at least 2 stops from full open, that will not be averted by the use of a TC, but the 2X or 3X exposure increase forces you into a very dark, hard to focus viewfinder situation. If you're really lucky to possess a lens that performs well at close to maximum aperture, make a note of that fact! "Okay to use with TC!" keith whaley
Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
Fred wrote: > > > ...you'll have the equivalent of a f16 400mm with any if these > > converters > Well, a 2X TC used with a K 200/4 would give you 400mm at ~f/8~ > (but, of course, you would then usually stop down, if possible). > > Fred That's one of the real problems with TCs, isn't it. If you need the sharpness of your prime lens, which is usually best at least 2 stops from full open, that will not be averted by the use of a TC, but the 2X or 3X exposure increase forces you into a very dark, hard to focus viewfinder situation. If you're really lucky to possess a lens that performs well at close to maximum aperture, make a note of that fact! "Okay to use with TC!" keith whaley
Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
It's was late, I was tired what can I say. At 09:20 PM 9/16/03 -0400, you wrote: > you'll have the equivalent of a f16 400mm with any if these > converters Well, a 2X TC used with a K 200/4 would give you 400mm at ~f/8~ (but, of course, you would then usually stop down, if possible). Fred To grasp the true meaning of socialism, imagine a world where everything is designed by the post office, even the sleaze. O'Rourke, P.J.
Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
> you'll have the equivalent of a f16 400mm with any if these > converters Well, a 2X TC used with a K 200/4 would give you 400mm at ~f/8~ (but, of course, you would then usually stop down, if possible). Fred
RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
Hello Hans , if you haven't got one, I could sell a Pentax T6-2x to you. I found that in reality I do not take pictures with more than 200mm so I am not in need for it any more. Please email me oof the list. Best regards Bernd ---original massage- From: Hans Beumer Subject: RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price? Date: Sun, 14 Sep 2003 08:34:57 -0700 I actually just would like to use the tele converter function, since I've got a A 100mm/4 macro-lens. So the macro-function is just an extra. greetings, Hans B.
RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
I actually just would like to use the tele converter function, since I've got a A 100mm/4 macro-lens. So the macro-function is just an extra. greetings, Hans B. -Oorspronkelijk bericht- Van: Tom Reese [mailto:[EMAIL PROTECTED] Verzonden: zondag 14 september 2003 15:03 Aan: [EMAIL PROTECTED] Onderwerp: RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price? Hans Beumer wrote: "With that vivitar macro converter, do you get a double focus-mechanisme, (one on the lens, and one on the converter) or just focus on the lens?" I suggest that you pre-focus the lens and set the vivitar extension so they give you the magnification that you want and then do your focusing by moving the camera toward and away from the subject. It's much less frustrating that way. In my experience, trying to focus the camera and hold it steady at the same time when your depth of field is only a quarter inch is an exercise in futility. I recommend a macro focusing rail mounted on a tripod if you're going to get serious about macro photography.
RE: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
Hans Beumer wrote: "With that vivitar macro converter, do you get a double focus-mechanisme, (one on the lens, and one on the converter) or just focus on the lens?" I suggest that you pre-focus the lens and set the vivitar extension so they give you the magnification that you want and then do your focusing by moving the camera toward and away from the subject. It's much less frustrating that way. In my experience, trying to focus the camera and hold it steady at the same time when your depth of field is only a quarter inch is an exercise in futility. I recommend a macro focusing rail mounted on a tripod if you're going to get serious about macro photography.
Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
On Sat, 13 Sep 2003, John Mustarde wrote: > The other Vivitar 2x teleconverters, like most 2x TCs, are often a > waste of money because they soften the image too much. Interesting. Does anybody know how bad the Kiron MC7 2X T/C for PA is? > Vivitar has the added value of the variable Macro extension tube built > in, which is a very useful feature. Is that like a zoom on the T/C? Thanks, Kostas
Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price?
You get two, and the one on the TC goes the wrong way. Apart from that it´s good. I´ve used mine with a 50 1.4 for years as an alternative to a 100 2.8 macro. Of course it´s not as good as the real macro lens, but close enough for many purposes. DagT På lørdag, 13. september 2003, kl. 18:16, skrev Hans Beumer: thanks for your respond. With that vivitar macro converter, do you get a double focus-mechanisme, (one on the lens, and one on the converter) or just focus on the lens? Greetings, Hans B. -Oorspronkelijk bericht- Van: John Mustarde [mailto:[EMAIL PROTECTED] Verzonden: zaterdag 13 september 2003 18:27 Aan: [EMAIL PROTECTED] Onderwerp: Re: Tele-converter, Pentax, Pentax or Vivitar, at wich price? On Sat, 13 Sep 2003 17:35:24 +0200, you wrote: I would like to get me a good 2x converter. I expect the Pentax T6-2X and A2X-S to be good. But I also here good sounds about the vivitar macro-teleconverter. And there is also a normal vivitar 2x converter. (I've seen the last one for about 12 euro's or 10 USD.) It should mainly be used on a MX +K200/4 Is there a great quality difference between these converters and what is a reasonable price in USD or Euro for these converters? (In good condition) Met vriendelijke groet (or greetings), Hans Beumer. mail to: [EMAIL PROTECTED] The "Vivitar 2x Macro Focusing Teleconverter" is one of the few good 2x TCs around. Price is about $45 to $55 used. The latest model for Pentax is the PK-A version. It is as good as any 2x TC except maybe some of the dedicated ones with the long snout that only fit certain lenses, such as the Pentax 2.0 X-L. The other Vivitar 2x teleconverters, like most 2x TCs, are often a waste of money because they soften the image too much. Better to get a good one the first time out, and the Vivitar 2x Macro Focusing Teleconverter is a good one. Generally, this particular 2x TC is much less expensive than Pentax models of similar optical quality, and the Vivitar has the added value of the variable Macro extension tube built in, which is a very useful feature. -- John Mustarde www.photolin.com
