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09-24-2009, 07:04 PM   #31
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If Pentax could release a WR version of 55-300 at a small premium, I would pick it up right away.

09-24-2009, 08:32 PM   #32
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QuoteOriginally posted by wowtip Quote
If Pentax could release a WR version of 55-300 at a small premium, I would pick it up right away.
Yes, a WR version really would be nice. I'd also like for them to resurrect the 16-45in WR guise (in my dreams).
09-24-2009, 08:50 PM   #33
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QuoteOriginally posted by Ex Finn. Quote
Primes are fine, I can only afford zooms, cheap ones at that.

Cheers. Mike.
Hi, Mike,

Let "BillMeLater" help you. You only live once.
09-24-2009, 08:58 PM   #34
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QuoteOriginally posted by Nubi Quote
Dude,
never too late to buy a nice prime or two.
QuoteOriginally posted by Ex Finn. Quote
And what (nice) or two) Pentax prime would that be?. Dude, get real, "55-300 rips it in and SR holds it steady" and all this without breaking the bank..

Cheers. Mike.
QuoteOriginally posted by Ex Finn. Quote
Primes are fine, I can only afford zooms, cheap ones at that.

Cheers. Mike.
How about an M or A200 F4? These are compact, quality (metal and glass) lenses that at F4 are faster than any zoom. Sure they are a little short at 200mm compared to a -300 zoom but if necessary with a 1.4 converter they would stretch to 280mm at F5.6.

09-24-2009, 11:18 PM   #35
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QuoteOriginally posted by Lowell Goudge Quote
...

For example, the aperture is actually continuously variable, and not changing in steps. the steps reported only correspond to steps in the 1/2 EV indexing used by Pentax in their mount. I would be willing to bet, that the exposure actually changes within the constant F stop range and is really only accurate at the middle focal length within the range. In this way the 1/2 stop steps become +/- 1/4 stop deviations from correct (i.e. perfect) exposure.

...
I tested my 55-300mm with a K20D set to 1/3 EV steps, the camera displays f-number incremental steps of f/4.0 to f/4.5 to f/5.0 to f/5.6. When set to 1/2 steps the camera displays f/4.0 to f/4.5 to f/5.6. Note that f/4.5 can't be both -1/3 EV and -1/2 EV changes, so the f-numbers aren't displayed very accurately. But that's another issue.

When you zoom the lens, it jumps to from f/4.0 to f/4.5 at 120mm and stays there thru 190mm using the 1/3 EV system. Based on your hypothesis, the f-number would be most accurate at about 120 + (190-120)/2 = 155mm for f/4.5.

Just for reference, if you calculate f-number based on aperture size:
-1/3 EV change should be f/4.38 rounded to f/4.4
-1/2 EV change should be f/4.62 rounded to f/4.6
-2/3 EV change should be f/4.90 rounded to f/4.9

BB
09-25-2009, 10:24 AM   #36
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Back to the Topic..

Got the 55-300 today. But it's raining (HARD) outside so I can't go and really play with it yet. But the few shots from the front window look very good. I'm thinking I won't miss the 50-200.
09-25-2009, 10:53 AM   #37
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QuoteOriginally posted by VaughnA Quote
Back to the Topic..

Got the 55-300 today. But it's raining (HARD) outside so I can't go and really play with it yet. But the few shots from the front window look very good. I'm thinking I won't miss the 50-200.
The one reason I could see to keep the 50-200 is that it is smaller. But I haven't seen the 55-300 in real life, maybe the size difference is not that great?
09-25-2009, 12:50 PM   #38
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QuoteOriginally posted by Nubi Quote
Hi, Mike,

Let "BillMeLater" help you. You only live once.
That is an idea, except.... my wife would "kill me now" . And then who would enjoy the lenses.

Cheers. Mike.

09-25-2009, 12:57 PM   #39
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The 55-300 is not much bigger or heavier than 50-200, both are nice and light.

Cheers. Mike.
09-25-2009, 01:15 PM   #40
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I have the 55-300 for weekend sports use and I'd trade up in a heartbeat!

QuoteOriginally posted by wowtip Quote
If Pentax could release a WR version of 55-300 at a small premium, I would pick it up right away.
09-25-2009, 01:20 PM   #41
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QuoteOriginally posted by Ex Finn. Quote
Primes are fine, I can only afford zooms, cheap ones at that.
Join the club!

I'd love a DA*300... but I settle for my 55-300 and am quite satisfied with it. I've had mine since the week it came out and never regretted my purchase.

Pat
09-25-2009, 02:46 PM   #42
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QuoteOriginally posted by ve2vfd Quote
Join the club!

I'd love a DA*300... but I settle for my 55-300 and am quite satisfied with it. I've had mine since the week it came out and never regretted my purchase.

Pat
See my thread in the Post Your Photos Forum. I'm in love!! Absolutely no regret about selling the 50-200 at all. A shocking difference in IQ to my old eyes.
09-25-2009, 03:26 PM   #43
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QuoteOriginally posted by Ex Finn. Quote
That is an idea, except.... my wife would "kill me now" . And then who would enjoy the lenses.

Cheers. Mike.
Oh, very good come back.
09-25-2009, 05:14 PM   #44
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QuoteOriginally posted by wowtip Quote
The one reason I could see to keep the 50-200 is that it is smaller. But I haven't seen the 55-300 in real life, maybe the size difference is not that great?
Been meaning to finish the post but here's a size comparison:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/68884-da-50-20...m-comparo.html

If you carry your equipment in a bag - not a problem with carrying the 55-300 vs the 50-200.
But.... If you like to carry lenses in your pants pocket, the bulk of the 55-300 can be an issue unless you have cargo pants to stow it in.
09-25-2009, 07:01 PM   #45
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QuoteOriginally posted by PentHassyKon Quote
Been meaning to finish the post but here's a size comparison:
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/68884-da-50-20...m-comparo.html

If you carry your equipment in a bag - not a problem with carrying the 55-300 vs the 50-200.
But.... If you like to carry lenses in your pants pocket, the bulk of the 55-300 can be an issue unless you have cargo pants to stow it in.
55-300 vs.A 70-210 f4, unfair to compare, owning both, AF is nice but IQ wins.

Cheers. Mike.

Little sidetracked?, sorry.
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