I don't believe there is something like a bad prime.
Simply search for the range you want and then look for feedback for that lens, but like said you're pretty safe of buying a prime lens.
Good luck with hunting


ps. You can look at pentaxforums.com for users lens feedback.

I believe the Tamron is a bit better on the long end then the sigma 70-300 though, the DA55-300 is even better but a bit more expensive.

For something else then the "budget" lenses you can also go for a bit longer sigma lenses, 120-400mm or 150-500mm.

First of all the first link this one link is wrong in his basics.
It explains how to make the standard HDR exposure. It's in some way the same but different.

With HDR we take a photo of the low, mid and high lights and then combine them in one shot so that the captured range of the photo is increased.

With stacking we do something else, to explain it very simple we add all the exposures together so simply speaking 2 exposures of 30 seconds will give you an exposure of equivalent of 60 seconds and also reduce noise in the mean time.

What you refer to at page 166 is what is usefully for HDR photos.

Yes you basicly only know what you got when you've progressed it at home but you can do more with the photos in photoshop and less likely to come home with a ruined shot.
If you ruined a shot of 25 minute then that would be worse then loosing on of the 30 seconds shots.
Also you don't need to do dark frame with stacking, noise will get removed because you use multiple shots and noise is never always the same.

This the best site that explain it link

It's missing an hood and quick-shift and it has a plastic lens mount.

mhmm indeed but 455gram is quite normal for lenses though.
DA55-300 is 440gram
DA17-70 is 485gram
DA*16-50 600gram
DA*300 1,070 gram
DFA100 345gram
DA40 90gram

So basicly the only thing you will gain is that you don't need to switch lenses and 50mm on the long end but that isn't so much.
here you can compare the difference link

The DA18-250 is not an light lens so it would weight down after some time, certainly if you add the weight of the camera. The DA40 and DFA100 combination I found lighter since you can distribute the weight.

Also how many of the shots would be on the wider the 55mm? for animals and such a DA55-300 lens would be better and when you want to do landscapes you can switch lens for that shots and then change back again.

The first shot is on a monopod but that's a 1 second exposure so still tricky to do
The rest is handheld.

Well if you click now on the photo you will have the full resolution, I did crop the photos a bit though!
will send you a PM about the RAW file.

How does the law work BTW?
This is for example an English site on an English base server so it falls under English law.
But I ain't in England but in the Netherlands, so under Dutch law... which copyright do I need to apply to now?

He's using RAW for the comparison.

yes that is basicly the summary but the sensor of the K7 is better at lower ISO, has less artefacts and is able to produce better video's.

But we know that the K7 can preform also pretty well at high iso and the extra MP should be able to level things out when comparing prints.

Just have some news that the DA 50-200 is out of production, the other versions of the lens will still be made but the original one not any more.

Comparison between the K7 and the K-X sensor link
Still need to read it myself but though I would already share it with you.

ps. updated it with a cleaner link.