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02-06-2009, 12:01 PM   #1
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DA 40mm

I got a few 50mm, includes the FA 50mm f1.4. And I'm current looking at the DA 40mm, I like its pancake style. I just want to know what's the big difference in term of range and performance, is it much wider and better than the FA 50mm? And how's it compare to 35mm and 28mm? . Or should i get it if i have 35mm and 28mm, but both are manual. or should i get a Tamron 28-75mm. both cost about the same. Thanx all





Last edited by winglik; 02-06-2009 at 12:25 PM.
02-06-2009, 12:12 PM   #2
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QuoteOriginally posted by winglik Quote
I just want to know what's the big difference in term of range and performance, is it much wider and better than the FA 50mm?
the 40 will be wider and slower
40 will look like 60 on DSLR
50 will look like 75

at the end I would like to have both
02-06-2009, 01:07 PM   #3
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Focal length can be a very personal thing. My 50 always seemed just a bit too long most of the time, which si really the main reason I got the 40. I find the focal length really perfect amazingly often - much more so than the 50. So the 50 doesn't get as much use any more, even though it's faster. I also have a 28 which I use quite a bit too - *much* more than the 50, but still not as much as the 40. I do find f/2.8 to be good enough most of the time - I don't mind shooting at ISO 1600 one bit, nor do I mind if I have to underexposre a little sometimes and push it in PP. But I am glad I have the 50 too that I can bring with me when I expect to need the extra speed or expect that I'll 50mm a better focal length (neither of which happens more than a couple of times a year for me).

Your mileage may vary.
02-06-2009, 01:12 PM   #4
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Got the FA50/1.4 and DA40/2.8 lenses, in addition to a FA35/2, (and an older M28.2.8). Hardly ever use the 35. Should have saved my money. Great lens and all, but I tend to use the 40, 21, or a zoom instead. Between the 50 and 40, really two different applications. In low-light, no question that the 1.4 is the go-to lens. For travel, nothing beats the pancake. Both have good optics.

02-06-2009, 01:20 PM   #5
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Great, thanx. i want the 40mm because i want to carry it aroudn with my K10D. Mostly, i will use it for day light environment that doesn't require F1.4. But i really like it's compactness. with it attached to the camera, it doesn't really stick out at all. But also consider the Tamron 28-75mm because it covers a better rang.

Last edited by winglik; 02-06-2009 at 01:27 PM.
02-06-2009, 01:30 PM   #6
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I picked the DA-40 over FA-50, figuring that the 75mm equivalent FOV is going to be too narrow for my taste, migrating from a 45mm/full-frame FOV. I can live without the extra f-stops -- I can bump up the ISO, and I'd rather focus fast/right in low light. Comparatively speaking, DA-40 is beautifully constructed, and it was only ~$20 more than FA-50 on Amazon at the time of my purchase -- a no-brainer for me.

The only thing that's driving me nuts is that, being such a small lens, I can't rest the camera on my left hand under it without impeding the focus-ring rotation.
02-06-2009, 04:49 PM   #7
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I'm with Marc and Steven (volosong) on this one.
I don't have FA50/1.4 but I have F50/1.7 instead in addition to DA40/2.8.
The pancake is great lens. I'd say it's one of the most under rated lenses in current Pentax line-up. I takes best part of my pics every month, and has many keepers. Opticaly it's superb, tack sharp from corner to corner straight from f2.8. It does perfectly for streets, landscapes, people, portraits, indoors with decent light... you name it!
50 is a great lens, but it's just tad too long to be normal prime and despite not being that much bigger, it's still not as portable as DA40...
BR
02-06-2009, 05:04 PM   #8
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Speedz!


Pancake lenses are neat, but don't exempt you from needing a lens hood under most circumstances. Which starts to equalize the size of any lens of reasonable size, proportionally.

Buy that 40 if you need a small, slow lens that will allow you to, umm, put a DSLR someplace where it might otherwise only fit without a lens. Good little thing, I gather. Part of a kit? Eh, I dunno.

02-06-2009, 06:36 PM   #9
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Small? Yes. Slow? Maybe not, maybe a stop or more faster than most zooms.

There is a lenshood in the equation, but it's also remarkably compact and probably the DA40+hood is still more compact than the hoodless FA50.
02-06-2009, 07:12 PM   #10
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Yeah, the hood on the 40 is the biggest part of it, and still tiny. It is a very useful lens. Sitting at a table across from my kids, 50 is too long but 40 is just right. A few times I needed wider for scenery, so I made a panorama with it. Easily my #1 or 2 lens, my (A) 50 1.4 is way down the list.
02-06-2009, 07:30 PM   #11
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The value of the FA50 1.4 is simply unquestionable. If the focal length suits your style...it's purchase is a no brainer.

I have the FA50 and the FA35 - both are excellent lenses (28 is too wide for my tastes). I find the DA40 too small to use (for me), f2.8 too limiting (I tend to shoot at f2 or 2.4), and like to future proof my lenses for the inevitable FF DSLR that Pentax will release some day.

If the 40mm length floats your boat...then your choice is easy.

I also have the Tamron 28-75mm. This lens gets my highest recommendations for usability. It's images are stunning, the focal range is perfect for people pictures (what I use it for), f2.8 is excellent (i.e. doesn't need to be stopped down to be usable), fairly light for constant ap., and it's price makes it a good value.

You can't choose wrong with any of these lenses...just choose the one that you will use the most.

c[_]
02-06-2009, 07:34 PM   #12
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The DA 40mm does cover full frame! Maybe slight vignetting at larger apertures, I haven't noticed. And you cannot use the hood, of course.
02-06-2009, 07:57 PM   #13
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I have the FA50 f/1.4 which does, indeed, allow me to take pictures hand-held in low-light conditions that would otherwise be impossible. The only problem is that until I close it down to f/4 or so it's extremely soft. I find myself wondering what's the point of having a fast f/1.4 lens if the pictures are too soft to be worth anything until you close down to f/4?????

CN
02-06-2009, 08:09 PM   #14
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Get this one !

...F ... A ... 4 ... 3 ... L ... t ... d

Winglik,
if you can save a little bit more money, I really suggest to get FA 43 Ltd.
You will never regret it.
It's one of the best lens and small enough.
The size is between FA 50 and DA 40 Ltd as well as the focal length.
I don't have DA 40 but I have some other primes like FA 50/1.4, F 50/1.4, FA* 24/2, F 28/2.8 and of course FA 43 Ltd is one among those primes.
Do you want to guess which one I use the most? :ugh:

Now FA43 Ltd is not that much used probably around $350,
but you get both functionality of FA 50 and DA 40 in one lens.

This is my first Ltd lens and I thought a lot before until some Pentax experts in other forums told me to get FA 43Ltd as my first lens based on their experiences with so many Pentax lenses in the past.
02-06-2009, 09:30 PM   #15
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QuoteOriginally posted by winglik Quote
I got a few 50mm, includes the FA 50mm f1.4. And I'm current looking at the DA 40mm, I like its pancake style. I just want to know what's the big difference in term of range and performance, is it much wider and better than the FA 50mm? And how's it compare to 35mm and 28mm? . Or should i get it if i have 35mm and 28mm, but both are manual. or should i get a Tamron 28-75mm. both cost about the same. Thanx all
If you're on a tight budget I would get the zoom because of the flexibility but it's of course not the same size and weigth as the FA50 let alone the DA40.

DA40 vs FA50. Not an easy one IMHO. The FA50 is faster but often gets really usable past f/2. But just for the speed, everybody should get the FA50. Optically the FA50 maybe a tad sharper but other optical qualities (bokeh, CA control and contrast) are in favor of the DA40. Also 9 blades (DA40) vs 8. I prefer 9 in highlights. The DA40 also focus faster (maybe the fastest Pentax lens). And it's metal, Limited and... cute
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