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06-08-2011, 02:57 AM   #196
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And both things have not been at Photokina 2010

10-20-2011, 11:16 AM   #197
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I would also like to buy some good teleconverter for my pentax lens(es).

what for type (1,4x or/and 2,0x) you want? 1,4x or 1,5x or something like this
max. price,you would pay for high quality? on the price level near the sigma teleconverters
what for lenses you would use with the converter? Pentax 60-250 at the time, maybe some else in the future ...
10-20-2011, 11:24 AM   #198
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QuoteOriginally posted by RoKro Quote
I would also like to buy some good teleconverter for my pentax lens(es).

what for type (1,4x or/and 2,0x) you want? 1,4x or 1,5x or something like this
max. price,you would pay for high quality? on the price level near the sigma teleconverters
what for lenses you would use with the converter? Pentax 60-250 at the time, maybe some else in the future ...
You will probably get more answers and opinions if you post your question in the Lens Discussion forum.
10-20-2011, 11:36 AM   #199
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I understand the first post in this thread as the question "who wants", something like public opinion research, and this was my reaction, my answer. But, maybe due to my bad english, it was my mistake.

10-20-2011, 01:30 PM   #200
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QuoteOriginally posted by RoKro Quote
and this was my reaction, my answer. But, maybe due to my bad english, it was my mistake.
Or perhaps a misunderstanding on my part as to the nature of your post.
10-20-2011, 03:40 PM   #201
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Pentax USA still shows the 1.4XL converter on their web store, for $520: PentaxWebstore.com: smc Rear Converter A 1.4xL

Realistically, adding a pair of contacts to pass through SDM isn't rocket science. They could likely sell a $300-$350 SDM/AF WR (a few o-rings also isn't rocket science, maybe 2 per side, tops?) all day long. Pricing it at $600 (guessing, based on the 1.4 current listing) they'd sell a handful, and do little to encourage any growth. I'm pretty sure they could make some $ off of it at $300-$350, would make a number of people frustrated with the lack of longer glass pretty happy, and encourage some lens sales at the same time.

A WR, SDM/AF 1.4x with sane pricing might make that DA* 200mm and DA* 300mm look pretty attractive to some (more).
10-20-2011, 06:28 PM   #202
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I am all for a good IQ, weathersealed SDM teleconverter which I would readily use with my DA*300/4.
Whether that'd be a 1.4x or 2.0x, I am hoping Pentax would follow suit to their old roadmap and start producing them converters!

Since I long for a "longer" lens (i.e.: Sigma 500/4.5) but cannot afford one, this would come in very handy.

JP
10-25-2011, 03:54 PM   #203
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I fell that teleconverters aren't necessary anylonger. With senors of 16+ mp - soon over 20, you can just crop. Still you will have more than enough pixels for high quality images and wont get the optical degradation a teleconverter will get you.....

10-25-2011, 04:03 PM   #204
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There is an interesting article about the canon extenders:

Canon Teleconverter Comparison - SLRgear.com!

The people from slrgear did testing 4 extenders and made a comparison.
10-25-2011, 07:38 PM   #205
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QuoteOriginally posted by RonHendriks1966 Quote
There is an interesting article about the canon extenders:

Canon Teleconverter Comparison - SLRgear.com!

The people from slrgear did testing 4 extenders and made a comparison.
Interesting comparison but is this something Pentax should perhaps emulate?

JP
10-31-2011, 07:37 PM   #206
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1.4 would be my preference ...highest quality available and I don't mind paying a few extra dollars to get that.
11-01-2011, 08:38 AM   #207
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QuoteOriginally posted by Pål Jensen Quote
I fell that teleconverters aren't necessary anylonger. With senors of 16+ mp - soon over 20, you can just crop. Still you will have more than enough pixels for high quality images and wont get the optical degradation a teleconverter will get you.....
I really don't understand this logic, especially since Pentax dropped the FA 600/4 from the line up. Second, I agree that a poor quality tc is a bane on a good lens and most of them are poor quality. However, there are some good ones out there and they are matched to either a specific lens or a small set of lenses. If the IQ is there, cropping is always an option. However, uncropping doesn't work very well.
01-15-2012, 09:26 AM   #208
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Good converter should work with more than one lens. A 1.4x would be great for the 4/300 SDM. Costwise a real good converter may be expetec above $350.
- add one or two long tele lenses with f/4 opening to make this a useful converter. The suggeste 4/400 (page 1) would be great. Angle of view like a 4/600, but more affordable and smaller. A 2.8/300 could do with a 1.4x, but would be too close to a 4/400.
any 1.4x converter needs a friend, add a 2x converter as well

The tricky part about converters is that the optical design on lenses must be ready for them. High quality converters typically require a dedicated line of lenses to perform really well - are our SDM tele lenses ready, did anyone think of this before at Pentax.
01-15-2012, 11:45 PM   #209
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1.7, less than $400.
01-15-2012, 11:47 PM   #210
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QuoteOriginally posted by Pål Jensen Quote
I fell that teleconverters aren't necessary anylonger. With senors of 16+ mp - soon over 20, you can just crop. Still you will have more than enough pixels for high quality images and wont get the optical degradation a teleconverter will get you.....
With good lenses and good teleconvertors (say the 500mm Sigma and Sigma TC's, or 300mm and 1.7) the teleconvertor and lens give you better images.

Of course if you need a fast shutter speed in only-ok light then you're better off with the non TC.
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