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04-27-2010, 07:06 AM   #16
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QuoteOriginally posted by boosted03gti Quote
the reason i bring this up is because this past weekend i was at a parade with some friends and was, at first, using my tammy 17-50. at first it was fine when i was taking pics of me and my friends that were standing near by but when i wanted to take a pic of a float, 50 mm wasnt cutting it. so after a while i walk back to the car, had a beer, and switched over to the 55-300. now i was able to get close to the floats but again, if i wanted to take a pic of my buddy doing something goofy or whatever, i was too close.
I'd get a camera bag. And a cooler. Seriously, I understand your dilemma - needing to switch lenses quickly. I've got a 16-50 and 50-135 and wish that there was some overlap between the two. If there was such a thing as a 16-90/2.8, I'd pair that with a 60-250 and be a happy camper.

04-27-2010, 07:56 AM   #17
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so does the dal 55-300 offer better iq then the tammy 18-250? i thought the tammy would offer better iq through out the FL...

im going to google for some comparison pics.
04-27-2010, 09:07 AM   #18
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QuoteOriginally posted by boosted03gti Quote
so does the dal 55-300 offer better iq then the tammy 18-250? i thought the tammy would offer better iq through out the FL...

im going to google for some comparison pics.
Check out Welcome to Photozone! for test comparisons. The consensus among users is that it does, especially at the longer focal lengths.
04-27-2010, 11:08 AM   #19
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Consider renting that 18-250 and giving it a good workout. It seems like a really huge range to me, it must have some sweet spots. Rental is a great option. Is the Tammy 18-250 the same as the Pentax 18-250? I don't know whether this one is a re-branded lens.

I really like the 16-45 for most of my shots, and with cropping you can usually get good images. Yeah, I'd like to be able to instantly zoom out to 200+ but not if it's really soft.

04-27-2010, 05:35 PM   #20
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QuoteQuote:
Wearing a small shoulder bag and switching out a couple of times in the course of a day is no big deal (at least to me). If he buys the 18-250/270, we may be seeing his post in a few months about what lens to buy to improve the IQ of his images.
Well, I have the DA 18-250 and I'm pretty confident that we wouldn't.
04-27-2010, 05:50 PM   #21
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QuoteOriginally posted by boosted03gti Quote
so does the dal 55-300 offer better iq then the tammy 18-250? i thought the tammy would offer better iq through out the FL...
What would have given you that impression?

My rough formula for predicting the optical quality of a lens:

price / zoom_range

That is, for a given price, the more zoom range a lens has, the worse its quality will will be (after all you don't get something for nothing). And for a given zoom range, the higher the price, the better its quality will be.
04-27-2010, 06:04 PM   #22
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QuoteOriginally posted by Tom in Delaware Quote
Well, I have the DA 18-250 and I'm pretty confident that we wouldn't.
Hang around this forum a while.

I'm not saying the 18-250 isn't a good lens. The photozone test has its performance roughly comparable to the kit lens, and I like the kit lens. However, a thread is posted almost every day about upgrading performance from the kit lens.
04-27-2010, 07:13 PM   #23
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QuoteOriginally posted by Tom in Delaware Quote
Well, I have the DA 18-250 and I'm pretty confident that we wouldn't.
+1 Numerous posts here and elsewhere showing what the 18-250 can do. The only cover shot I've ever sold was taken with the 18-250. It's perfectly capable of outstanding shots.

That being said, it's probably not better than the 55-300. The only reason to sell the 55-300 is for convenience. The 18-250 is a great travel lens. Add a small prime to your kit and you can cover just about any situation on a trip. See the link elsewhere on this site about the pro that took the K-7 and the 18-250 on a mountaineering expedition.

04-27-2010, 07:20 PM   #24
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QuoteOriginally posted by TER-OR Quote
Is the Tammy 18-250 the same as the Pentax 18-250? I don't know whether this one is a re-branded lens.
I've owned both at the same time and while the coatings appear to be different from the color tint, they produce essentially the same shots and have the same drawbacks (vignetting at shorter focal lengths, and a little barrel distortion at the wide end). The Tamron came out about 4-6 months before the Pentax (or any other brands, like Sony). Also, the Pentax version is the only DA lens (IIRC) that doesn't have quick shift AF adjust or the handy little window in the lens hood that allows you to adjust a circular polarizer with the hood on. All of these facts tell me that the Tamron came first and the other companies, including Pentax, licensed the design from Tamron.


QuoteOriginally posted by TER-OR Quote
I really like the 16-45 for most of my shots, and with cropping you can usually get good images. Yeah, I'd like to be able to instantly zoom out to 200+ but not if it's really soft.
I also have the 16-45, and there's really no way a cropped image from it will beat at shot at 200mm + from the 18-250. Also, the 18-250 is pretty much the same speed over the same focal range (of course, you can't get the 16mm-18mm range). I checked and the 18-250 at 45mm is around f/4.0. I've basically made the 18-250 my kit/walk around/travel lens. I'm keeping the DA*16-50, but the other kit variations don't really have anything over the 18-250.
04-27-2010, 07:46 PM   #25
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QuoteOriginally posted by TER-OR Quote
C Is the Tammy 18-250 the same as the Pentax 18-250? I don't know whether this one is a re-branded lens.
The Pentax DA18-250mm is a rebadged Tamron 18-250mm. These two lenses are really very, very close.

An advantage of the DA18-250mm is that you can enable in-camera lens distortion correction in the K-7 and K-x. This being said, I have a DA18-250mm and I no longer enable lens distortion correction. I prefer to do most lens distortion and chromatic aberation PP with PCDU.. Why? I do often some Hi continuous shooting. The PP is very slow compared to the Hi frame rate (5.2 fps) and I want to be able to switch from single shot to Hi continuous very rapidly.
04-28-2010, 07:52 AM   #26
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I've got a 55-300 and I wouldn't sell it. Photos are crystal clear from 55 to 300. Pop Photo gives it top marks.
04-28-2010, 12:46 PM   #27
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QuoteOriginally posted by GeneV Quote
I'm not saying the 18-250 isn't a good lens. The photozone test has its performance roughly comparable to the kit lens, and I like the kit lens. However, a thread is posted almost every day about upgrading performance from the kit lens.
While this is true, the 18-250 is *not* the kit lens, and the *reasons* people often ask about upgrading from the kit lens don't necessarily apply to the 18-250 eve though certain aspects of their performance may be similar.

To wit, many of the questions about upgrading are about wanting more range, and frankly many others are because someone failed to get a good shot due to user error but blamed it on the lens because they figured it can't be good since they got it for free. Neither of these would apply so much to the 18-250. There are of course quite a few looking for a faster (larger maximum aperture) lens with similar range, or one with closer focusing, but a good number of those end up deciding to *supplement* rather than *replace* their kit lens (for instance, with a prime, or with the Tamron 28-75, or with a closeup adapter). And the desire to supplement rather than replace seems considerably more true of the 18-250, simply because the 18-250 is impossible to replace with a faster or closer focusing version.
04-28-2010, 01:11 PM   #28
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so just so you guys know. i have decided to keep my 55-300 and will just simply swap lens around when neccessary. i have a kata dr-465 but will look into a lowepro sling to carry the cam, 17-50, and 55-300 around.

yesterday, coming home from work, i found 2 ducks hanging out by the mail box. i started shooting with the 55-300 but i was unable to get close enough to really fill the frame and get a shot with, what i think, is good composition. so now, i think my next lens purchase will be something in the 400mm range or should i consider a 1.4 or 1.5 TC with my dal 55-300. will i just be better off cropping images or will i be better off investing in a TC? which one, cropping vs TC, maintains better IQ. i know i will loose IQ with either, but which one will degrade quality the least.

thanks
jorge.
04-28-2010, 01:29 PM   #29
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Depends on the TC. A couple people have said they've been playing around and hope to post comparisons, and I hope to see some. But in general, cheap TC with zoom lenses like the 55-300 *don't* do better than cropping. If you get lucky, you might find a TC that *slightly* beats cropping, but only if you don't mind losing a stop of light and having AF get all flaky on you. So I wouldn't be in a hurry to buy anything before someone gets a good comparison posted - for now, cropping is still the way to go.
04-28-2010, 02:03 PM   #30
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QuoteOriginally posted by boosted03gti Quote
so just so you guys know. i have decided to keep my 55-300 and will just simply swap lens around when neccessary. i have a kata dr-465 but will look into a lowepro sling to carry the cam, 17-50, and 55-300 around.

yesterday, coming home from work, i found 2 ducks hanging out by the mail box. i started shooting with the 55-300 but i was unable to get close enough to really fill the frame and get a shot with, what i think, is good composition. so now, i think my next lens purchase will be something in the 400mm range or should i consider a 1.4 or 1.5 TC with my dal 55-300. will i just be better off cropping images or will i be better off investing in a TC? which one, cropping vs TC, maintains better IQ. i know i will loose IQ with either, but which one will degrade quality the least.

thanks
jorge.
My experience is that there never seems to be a lens long enough for the bird I want to catch.
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