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05-08-2011, 04:12 AM   #1
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Help: Choosing new pentax lenses?

I have a dilemma with pentax, one that followed me right from the beginning when I decided to get into pentax instead of cannikon.
In order of importance:
1. Weather sealing
2. Bang/buck
3. Felt really well balanced and built, like a light rubber brick. My d200 is heavier and leans towards the left when I one hand it.

Now lenses, they're far more important than the body for image quality, but the problem is that I'm on a tight budget and I don't know what to get.
I have an 18-135 wr right now, but I can't buy any more lenses. I'm thinking of selling it and buying the 18-55 and 40/2.8.
Requirements: at least one weather sealed lens, fast normal (~28mm).

The problem with this setup is the kit lens thing and the fat, narrow, slow 40. I like wide angles and want to be able to use them without having the kit lens fart on every picture that I take at 18. I also want very shallow depth of field, and the faster shutter that comes with it is nice too. The in-body shake reduction doesn't benefit me that much as I hold it quite steadily so it only gives me one stop anyway.

I'm willing to ignore the above paragraph if it's the only option for my budget, but are there any better choices available? My budget is whatever I'd get for selling the 18-135.

I'm used to using the $120 50/1.8 that's 90% of my criteria. It's too wide, has amazing sharpness at 2.8, and can be opened wide when I need it for a shot or more light. For a $400 prime, I would expect better build, the same sharpness at f/2.8, and far more awesomeness.

edit: oh, macro lens and flash are highly desired in the reasonably near future, but only if I can afford them both at the same time (or if I don't need one, or if I can use my nikon flash).


Last edited by Trysaeder; 05-08-2011 at 05:08 AM.
05-08-2011, 05:24 AM   #2
axl
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Ok in order of importance:
How is 50/1.8 too wide?
How is 40 fat and narrow?
Why do you think DA18-55WR farts? It's actually very decent lens for kit lens, definitely not worse than 18-135...
And how does kit WR+DA40 give you "one weather sealed lens, fast normal (~28mm)" ?
05-08-2011, 05:34 AM   #3
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Original Poster
Oops, I meant narrow. 50/1.8 was too narrow.
40/2.8's depth of field is too fat, and the focal length is still a bit too narrow, though I can live with it.
My experience with kit lenses is that they perform quite poorly at 18. I probably won't mind too much in the rain, but in the cold I will as that environment is one of my favorites.
18-55 is weather sealed, 40/2.8 is pretty close to a fast normal.
05-08-2011, 05:56 AM   #4
axl
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Ok, first point understood.
2nd, if you think 40/2.8 is has too big DOF yet narrow FOV have a look at FA35/2 or it's Samsung labeled version.
Generaly the kit lenses aren't stellar but I wouldn't think DA18-138DC is any bettwer @18mm than DA18-55WR.
If you are seeing 28mm as normal then no, 40 is not all that close. 12mm on APSC is huge gap. I'd say if you are after wider FOV (than 40) normal, then you should be looking int 35mm ish range. And if you want macro, you can kill 2 flies with one slap by ghetting DA35ltd. It would serve you as normal and macro, although admitably, the DOF will be even bigger than with 40. Other options would be, FA35/2 (or Samsung version), or DA35/2.4

05-08-2011, 03:35 PM   #5
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You'll lose dollars on change over, I'd keep your 18-135 and save for a second hand Sigma 30mm f1.4, sounds like that's the kind of lens you are after. I have a DA40 and a FA31 and far prefer the FA31 due to its FOV and wider aperture.
05-09-2011, 12:26 AM   #6
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I can't add any more than $50 to whatever I have, so that's not really an option for me.
The 30/1.4 costs similar to the 40/2.8, so that's probably a better choice. I don't really like sigma because of their reputation, and the pancake is so cute.
05-09-2011, 02:08 AM   #7
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Oh, now I can't decide between the sigma 30/1.4 or the pentax 40/2.8.

pentax:
$0-50 more
Lighter (90g vs 430)
Smaller (duh)
Slower (2 stops)
Better built (??)
PANCAAAAAAKE (awesome)

sigma
Has the sigma quality
Can buy new with local warranty or used quite easily
More likeable focal length (not that big of a deal)
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