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10-10-2013, 08:57 AM   #1
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fast 50s, other fast lenses, nice bokeh?

Okay, I really want to spend some money on fast lenses... (fast meaning faster than f/2...) i have been recommended the rokinon M 85mm/1.4 ashperical which is surprisingly cheap. I have the rikenon 50/1.7 but the bokeh is only good wide open... even at 2.8 it is a hexagon (it only has 6 blade.. i think hexagon bokeh is ugly...) and for 50 maybe 1.4 or 1.2 would be better... you can suggest under 50 but not wide angle... i don want distortion. i think 40mm is okay? what fast 50's have nice bokeh and maybe a lot more blades? what are the prices? what other fast lenses are good... let's say if i have a $1200 budget for example? if i want a lens near 50mm and something longer too?

10-10-2013, 09:01 AM   #2
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i forgot to say: I don really use AF... but sometimes it can be useful! if AF lens is not too expensive you can suggest sharp is good... C/A is bad...
10-10-2013, 09:13 AM   #3
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You´ve got infinit budget so you can´t go wrong... DA*55...
10-10-2013, 09:24 AM   #4
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QuoteOriginally posted by carrrlangas Quote
You´ve got infinit budget so you can´t go wrong... DA*55...
haha not infinite... da*55 looks good... very good... the bokeh is nice at all aperture... it is not a cheap 50 but i think it is worth it? with $624 + $250 i would get DA*55/1.4 and aspherical M 85mm/1.4 for $874... easily within budget... this seems like the best option so far... but i will keep my eyes open! any other suggestions? ^^ f/1.2 would be great but i don know if it is within the budget?

10-10-2013, 09:27 AM   #5
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Or the FA31 ltd if you have that kind of budget...

The DA 50 f1.4 might be worth playing with. It's certainly affordable.

I have a Sigma 28mm f1.8 macro - it has a bit of distortion, very minor and Lightroom will correct. It's nice enough.
10-10-2013, 09:32 AM   #6
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TER-ROR thank you for the suggestions... I will check out fa31 ltd. but i really don like too short focal distance xD i don shoot macro right now... i am more interested in portrait, landscape, so wide angle not necessary! edit: i can not find... SMC Pentax-FA 31mm F1.8 AL Limited Reviews - FA Prime Lenses - Pentax Lens Reviews & Lens Database is what i found, but f/1.8 is too slow for the price...
10-10-2013, 09:42 AM   #7
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It's just my experience, but I'd try to stay in that 30ish range - which on the crop cameras seems to me to be closest to native eye magnification.

I just bought a mint M50 f1:1.4 but haven't had the chance to play with it beyond confirming that it actually works. It's a beauty, though.
10-10-2013, 09:51 AM   #8
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I hope it's better than the M P 50/1.7, I can confirm it is a disappointment... you can get good shots with it, but it really is not the best lens... maybe i'm thinking FF... somehow i always think "not below 50". maybe i will look into 30s more... thank you

10-10-2013, 10:07 AM   #9
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The F/FA50 f1,7 should be avoided if bokeh is the first spec you'll look at. the FA50 f1,4 has a nice, creamy bokeh. All the Pentax f1,4 fifties do, in fact. The FA43 f1,9 and DA40 f2,8 also have beautiful, uniform bokeh that you don't notice (which is good, right?)

In the tele end, I don't know the 85mm you refer to. The FA77 and DA70 are excellent, the best is probably the DFA100mm macro WR, with rounded apertures and the smoothest bokeh.

Which makes me think. The FA50 f2.8 macro and its more recent sibling the DFA have excellent bokeh also. The newer DA limited lenses (40, 70 in my previous list) will have rounded apertures and probably better bokeh because of that.

I hope this list helps you in your search!
10-10-2013, 10:13 AM   #10
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QuoteOriginally posted by bdery Quote
The F/FA50 f1,7 should be avoided if bokeh is the first spec you'll look at. the FA50 f1,4 has a nice, creamy bokeh. All the Pentax f1,4 fifties do, in fact. The FA43 f1,9 and DA40 f2,8 also have beautiful, uniform bokeh that you don't notice (which is good, right?)

In the tele end, I don't know the 85mm you refer to. The FA77 and DA70 are excellent, the best is probably the DFA100mm macro WR, with rounded apertures and the smoothest bokeh.

Which makes me think. The FA50 f2.8 macro and its more recent sibling the DFA have excellent bokeh also. The newer DA limited lenses (40, 70 in my previous list) will have rounded apertures and probably better bokeh because of that.

I hope this list helps you in your search!
the 1.4 is the aspherican 85/1.4 by rokinon/other brands (same lens, different brands, I don remember them now) uniform bokeh is good i think i read you should avoid fa50/1.7 too... not sharp at all, many bad reviews for sharpness... i also care about sharpness but i don need it to be very very sharp wide open but if it is even better... thank you for your answer now i have to go, i will look here again tomorrow
10-10-2013, 12:16 PM   #11
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I think
QuoteOriginally posted by cream Quote
but f/1.8 is too slow for the price...
Note that on the FA31 and FA77 it's a usable f/1.8 - most lenses don't have near-optimal IQ wide open, but these do. Likewise, the DA*55 is usable at/near wide-open, unlike any AF 50 Pentax has ever made.

Your best resources right now are other's photos, if you study them carefully and look at what aperture they were taken with. The top 3 places to look IMO are:

PENTAX : Select a PENTAX interchangeable lens camera or a lens model
Pentax smc P-FA 77mm f/1.8 Limited Lens Sample Photos and Specifications
Full-size sample photos from Pentax 85mm F/1.8

I'd consider:

K50/1.2

DA*55/1.4

FA77/1.8
FA31/1.8

maybe K85/1.8 (I don't have experience with this lens)
10-10-2013, 12:40 PM   #12
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I'd go with a Sigma 50 1.4. Superb lens.

The FA50 1.4 and 1.7 (also F series) are both good, too. The Sigma, to me, is the best for bokeh.
10-10-2013, 01:05 PM   #13
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QuoteOriginally posted by cream Quote
the 1.4 is the aspherican 85/1.4 by rokinon/other brands (same lens, different brands, I don remember them now) uniform bokeh is good i think i read you should avoid fa50/1.7 too... not sharp at all, many bad reviews for sharpness... i also care about sharpness but i don need it to be very very sharp wide open but if it is even better... thank you for your answer now i have to go, i will look here again tomorrow
See the reviews here for the FA 50mm 1.7 SMC Pentax-FA 50mm F1.7 Reviews - FA Prime Lenses - Pentax Lens Reviews & Lens Database

Sharpness doesn't seem to be a problem, or anything else. I have one and like it, but my only other experience is with an 18-135mm.

Last edited by RyanS; 10-10-2013 at 01:14 PM.
10-10-2013, 01:12 PM   #14
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In addition to fast lenses there are a lot of legacy preset lenses with round apertures that give great bokeh even when stopped down
10-10-2013, 01:17 PM   #15
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Helios 44-2! (or other variant)
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