50mm 1.4, 40mm 2.8, or 35mm 2?

ftpaddict · 09-03-2008, 05:14 AM

50 all the way. Any aperture.

Sila · 09-03-2008, 05:36 AM

If you look at www.photozone.de

You can see that the 35mm is the "sharpest"

Peter Zack · 09-03-2008, 05:58 AM

I've owned the 31,35,40,43 and 50. I currently only own the FA50 f1.4. Fast and excellent IQ. Yes a little soft at 1.4 but it is still usable there and that's a nice aperture for special applications.

The 40 just didn't make any sense to me. Nice lens and very good IQ but I also own a Tamron 28-75 f2.8 and the 40 isn't fast enough to bother keeping.

The 43mm is a stunningly nice lens even when wide open. I only sold mine for cost cutting reasons and hope/will to someday replace it.

The 31mm is in a league of it's own in many ways. I needed the funds for my business and replaced it with a very good Sigma 28mm f1.8.

The 35mm f2 is a fine lens and probably a little better in IQ than the FA50. So between the 2, the question is speed and focal range. Does the extra 1.4 matter to you (one full stop) and do you want something wider? Again I only sold my FA35mm because I need different equipment for my photo work. I might have replaced this lens down the road but I like my Sigma 28mm and the 2 are close enough that the Sigma does just fine.

But for an all around mid length but slightly longer than normal prime the 50 is the best for cost and quality. Sure it has some limits in build and MF focus but as long as you don't use it as a hammer, it should last a lifetime and give great results. Photozone rate the 50 very highly and I read somewhere that Klaus felt it was the best fast fifty available from any company.

nupentaxian · 09-03-2008, 08:58 AM

i guess any of those three is a good choice. which mm do you shoot more/would like to shoot at? that would be the one that i'll be getting if i were u.

SuperJared · 09-03-2008, 05:11 PM

Thanks for all the input, guys. I finally decided on the 50 and I certainly like it.

roentarre · 09-03-2008, 10:07 PM

Originally posted by Peter Zack

The 40 just didn't make any sense to me. Nice lens and very good IQ but I also own a Tamron 28-75 f2.8 and the 40 isn't fast enough to bother keeping.

That is exactly how I think of 40mm as well.

Spongefingers · 09-04-2008, 02:43 AM

I'm still waiting on my FA50 1.4..! I haven't recieved it yet but I know it will be good for me, as the vast majority of shots I take are outdoors in available light. Plus, it will be far and away the fastest lens I have (the next two being a couple of old M42 f1.8 50mm lenses, and the fastest zooms I have are f3.5-5.6.) This factor is really what I'm getting it for.
I'm going to use it on my K10D, and also on an MZ-5n with Fuji Neopan 1600 for super-fast film performance. Also, I'm hoping that 1600 film may negate some of the reported softness of the lens wide open. (A double bonus?)

I only recently discovered that the DA40 is full-frame compatible due to it being a re-working of an old design, so that's one to get in the future. It may be a similar focal length, but I think it's sufficiently different in other ways (compactness, focus speed, quick shift, quite reasonably priced) that it's worth getting as well.

It frustrates me that the compatibility info on Pentax DA lenses is so minimal, that to find out if a DA lens is actually decent on a film body you have to rely on a random third party testing one and posting info on it - but kudos to those who do, Keep doing it.

RioRico · 09-04-2008, 06:53 AM

I hate 'normal' lenses (which might mark me as a deviant). But that's just me. Since I don't make my living at this, I'm free to indulge my prejudices. 'Normal' makes me feel like I'm wearing blinders. Wider lenses IMHO are more flexible, and if I don't like what's happening at the margins, I just step closer, or crop. I use Vivitars 24/2 and 28/2.8. A couple of Takumar 28/2.8s (auto PK and manual M42) should arrive today, so maybe I'll get a new favorite. And the FA 50/1.4 is a real gem.

TDN · 09-04-2008, 07:07 AM

A 50mm is something every photographer should have in his/her camera bag, in my opinion...

So, the 50mm f1.4

MrA · 09-04-2008, 11:34 AM

I find 50mm too long, so I've voted 35mm f2. Don't forget that 35mm x 1.5 = 52mm anyway. (50mm x1.5 = 75mm). Then again, I have nothing faster than f1.7 at present.

(Currently saving for a 30mm f1.4 or 24mm f1.8

)

View Poll Results: Which lens?
50mm 1.4	59	50.86%
40mm 2.8	26	22.41%
35mm 2	37	31.90%
Multiple Choice Poll. Voters: 116. You may not vote on this poll

09-03-2008, 05:58 AM	#18
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Photos: Gallery \| Albums Posts: 10,643	I've owned the 31,35,40,43 and 50. I currently only own the FA50 f1.4. Fast and excellent IQ. Yes a little soft at 1.4 but it is still usable there and that's a nice aperture for special applications. The 40 just didn't make any sense to me. Nice lens and very good IQ but I also own a Tamron 28-75 f2.8 and the 40 isn't fast enough to bother keeping. The 43mm is a stunningly nice lens even when wide open. I only sold mine for cost cutting reasons and hope/will to someday replace it. The 31mm is in a league of it's own in many ways. I needed the funds for my business and replaced it with a very good Sigma 28mm f1.8. The 35mm f2 is a fine lens and probably a little better in IQ than the FA50. So between the 2, the question is speed and focal range. Does the extra 1.4 matter to you (one full stop) and do you want something wider? Again I only sold my FA35mm because I need different equipment for my photo work. I might have replaced this lens down the road but I like my Sigma 28mm and the 2 are close enough that the Sigma does just fine. But for an all around mid length but slightly longer than normal prime the 50 is the best for cost and quality. Sure it has some limits in build and MF focus but as long as you don't use it as a hammer, it should last a lifetime and give great results. Photozone rate the 50 very highly and I read somewhere that Klaus felt it was the best fast fifty available from any company. Last edited by Peter Zack; 09-03-2008 at 06:03 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DAL 35mm 2.4 vs. DA 40mm 2.8 LTD	paperbag846	Pentax SLR Lens Discussion	51	10-30-2010 12:50 AM
Help me choose: 40mm LTD / 35mm LTD	boushh	Pentax SLR Lens Discussion	6	06-24-2008 03:55 PM
DA 35mm macro v. 40mm v. other	MSM	Pentax SLR Lens Discussion	2	01-29-2008 01:19 PM
Pentax 40mm f/2.8 or 35mm f/2 ?	guillermovilas	Pentax SLR Lens Discussion	10	04-03-2007 01:13 PM

09-03-2008, 05:14 AM	#16
ftpaddict Veteran Member Join Date: Jan 2008 Location: Yurp Photos: Gallery Posts: 4,666	50 all the way. Any aperture.

09-03-2008, 05:36 AM	#17
Sila Forum Member Join Date: Apr 2008 Location: Denmark Photos: Gallery Posts: 97	If you look at www.photozone.de You can see that the 35mm is the "sharpest"

09-03-2008, 08:58 AM	#19
nupentaxian Senior Member Join Date: May 2008 Location: Arizona Posts: 290	i guess any of those three is a good choice. which mm do you shoot more/would like to shoot at? that would be the one that i'll be getting if i were u.

09-03-2008, 05:11 PM	#20
SuperJared Inactive Account Join Date: Jan 2007 Location: Portland, OR Posts: 167 Original Poster	Thanks for all the input, guys. I finally decided on the 50 and I certainly like it.

09-03-2008, 10:07 PM	#21
roentarre Veteran Member Join Date: Oct 2006 Location: Melbourne, Australia Posts: 11,783	Originally posted by Peter Zack The 40 just didn't make any sense to me. Nice lens and very good IQ but I also own a Tamron 28-75 f2.8 and the 40 isn't fast enough to bother keeping. That is exactly how I think of 40mm as well.

09-04-2008, 02:43 AM	#22
Spongefingers Senior Member Join Date: Aug 2008 Location: UK Photos: Gallery Posts: 237	I'm still waiting on my FA50 1.4..! I haven't recieved it yet but I know it will be good for me, as the vast majority of shots I take are outdoors in available light. Plus, it will be far and away the fastest lens I have (the next two being a couple of old M42 f1.8 50mm lenses, and the fastest zooms I have are f3.5-5.6.) This factor is really what I'm getting it for. I'm going to use it on my K10D, and also on an MZ-5n with Fuji Neopan 1600 for super-fast film performance. Also, I'm hoping that 1600 film may negate some of the reported softness of the lens wide open. (A double bonus?) I only recently discovered that the DA40 is full-frame compatible due to it being a re-working of an old design, so that's one to get in the future. It may be a similar focal length, but I think it's sufficiently different in other ways (compactness, focus speed, quick shift, quite reasonably priced) that it's worth getting as well. It frustrates me that the compatibility info on Pentax DA lenses is so minimal, that to find out if a DA lens is actually decent on a film body you have to rely on a random third party testing one and posting info on it - but kudos to those who do, Keep doing it.

09-04-2008, 06:53 AM	#23
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	I hate 'normal' lenses (which might mark me as a deviant). But that's just me. Since I don't make my living at this, I'm free to indulge my prejudices. 'Normal' makes me feel like I'm wearing blinders. Wider lenses IMHO are more flexible, and if I don't like what's happening at the margins, I just step closer, or crop. I use Vivitars 24/2 and 28/2.8. A couple of Takumar 28/2.8s (auto PK and manual M42) should arrive today, so maybe I'll get a new favorite. And the FA 50/1.4 is a real gem.

09-04-2008, 07:07 AM	#24
TDN Forum Member Join Date: Jun 2007 Location: Belgium Photos: Gallery Posts: 96	A 50mm is something every photographer should have in his/her camera bag, in my opinion... So, the 50mm f1.4

09-04-2008, 11:34 AM	#25
MrA Senior Member Join Date: Mar 2008 Location: England UK Posts: 211	I find 50mm too long, so I've voted 35mm f2. Don't forget that 35mm x 1.5 = 52mm anyway. (50mm x1.5 = 75mm). Then again, I have nothing faster than f1.7 at present. (Currently saving for a 30mm f1.4 or 24mm f1.8 )