| Author: | | Site Supporter Registered: January, 2009 Location: Champagne Ardennes, France Posts: 20 | | Review Date: October 29, 2023 | Recommended | Price: $80.00
| Rating: 9 |
| Pros: | Light, bookeh, IQ | | Cons: | Usually overpriced | | Sharpness: 9
Aberrations: 9
Bokeh: 9
Handling: 9
Value: 9
Camera Used: K30
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I can confirm other reviews for optical qualities, bookeh and image quality : Nice lens to have but IMO the A50 f1.7 is equal or better than this one. Going from 1,7 to 1,4 don't worth the price you usually have to pay for it (Think also that 1.4 deep of field is hard to manage).
Picture at f1.4
Picture at f5,6
 | | | | | | | New Member Registered: January, 2023 Posts: 2 | | Review Date: June 2, 2023 | Recommended | Price: $60.00
| Rating: 8 |
| Pros: | Cheap, lightweight, easy to use and focus, sharp. | | Cons: | it's actually OK, I wouldn't say anything bad about this lens | | Sharpness: 8
Aberrations: 7
Bokeh: 8
Handling: 10
Value: 9
Camera Used: Pentax K-70
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The lens is really fine, I appreciate above all the smooth focus-ring which allows quick focussing and good feelings by taking pictures.
The colours are also very beautiful when the spotlights are nailed, otherwise... just OK.
This is probably not the lens you would expect to get the whow-effect from your pics, but at the end it's a good, well-built, lightweight companion for street or random pictures and also very useful     for Macro using it with rings.
| | | | | New Member Registered: November, 2013 Posts: 14
1 user found this helpful
| | Review Date: June 1, 2022 | Recommended | Price: $100.00
| Rating: 10 |
| Pros: | very sharp lens | | Cons: | some few CAs wide open | | Sharpness: 10
Aberrations: 9
Bokeh: 10
Handling: 10
Value: 10
Camera Used: pentax k-5 k200 k-x k-s1 Fuji x-t100 x-e1
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(changed review)
Best results between f 2.8 and f 11 
Predestinated for tele converter using and astro or macro shootings
++ great sharpness
++ nice colors 
++ excellent bokeh 
+ good contrast (some flare wide open )
O/+ some visible CAs wide open in the edges
*********************************************************************************************************
IMPORTANT TIP FOR OWNERS OF 1.7 x AF CONVERTER:
+++ excellent sharpness between f 2.8 and f 5.6 with APS-C sensor and no more remarquable CAs - with 85 LP/mm = 170 black and white lines/mm an excellent and professional value !
(magnifications up to 80 x 120 cm possible)
**********************************************************************************************************
totally 9.5 points
| | | | | New Member Registered: August, 2017 Location: Ronneburg Posts: 1
1 user found this helpful
| | Review Date: February 10, 2022 | Recommended | Price: $96.00
| Rating: 10 |
| Pros: | A-setting, speed, smc-colours | | Cons: | none to me | | Sharpness: 10
Aberrations: 9
Bokeh: 9
Handling: 10
Value: 10
Camera Used: Z-1
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Pentax A SMC 50 f1.4 is a great value for the money. It is small, light, and there are lot of them around making the price reasonable. Slightly softer at f1.4 it reaches very good figures from 2.8
| | | | | | | New Member Registered: August, 2020 Location: Cremona Posts: 11
4 users found this helpful
| | Review Date: March 15, 2021 | Recommended | Price: $150.00
| Rating: 9 |
| Pros: | Sharpness, white matching, versatility. | | Cons: | Nothing if used properly. | | Sharpness: 10
Aberrations: 8
Bokeh: 10
Handling: 10
Value: 9
Camera Used: Pentax K-1
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I use it on the K-1 and I love it so much.
I am mainly a landscape photographer, then I also do a few portraits but I use this lens a lot for urban nights, where closed it gives me record sharpness (even without post production), and fabulous stars (light at f-5.6 f-16).
For the landscape, the -A mechanism then allows me to manage the shots from a smartphone (for landscape), because the position of FOCUS at INFINITY is perfect and accurate, corresponding to the end of the ring.
Backlight needs protection but you already know it, its green / purple chromatic aberration is very low, almost non-existent, on K-1 the white is perfect and faithful and the photo has a neutral "COLOR", which I consider worthy of a lens of excellence.
The distortion is obviously very contained and it is not a drama not to have a raw camera profile.
Open at f1.4 it is very usable for small animals, children, close-ups, macros but this is an obvious thing because we know what its depth of field is at f1.4 where its sharpness is acceptable and immediately improved in post production.
I also fell to the ground, its body is made of metal, really qualitative, in the hand it gives a beautiful feeling of quality.
I also use this lens with the Panagor Auto Macro 1: 1 adapter and its rendering is professional.
It's a prime lens to HAVE in the collection.
I bought it used for 135 euros (2019).
P:S Forgive me for the bad English, I hope I made myself understood.
| | | | | New Member Registered: September, 2020 Location: Derbyshire Posts: 3 | | Review Date: October 16, 2020 | Recommended | Price: $125.00
| Rating: 10 |
| Pros: | Build quality, electronic contacts, handling, optical quality | | Cons: | Sometimes overpriced by the market | | Sharpness: 10
Aberrations: 10
Bokeh: 8
Handling: 10
Value: 10
Camera Used: KX , MZ5n
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Having used both the Zuiko and Nikkor 50mm 1.4's I think that this is my favourite of any brand I have ever had (the Zuiko silver nose I had was sharp but suffered from severe internal reflections in bright light at wide apertures).
I actually think it is better than the Nikkor at wide apertures below 2.8, and the 8 bladed aperture means that the bokeh is not as nervous looking as the Nikkor either. However BOTH are useable in order to make great pictures at wider apertures. And yes - make sure it has a hood which I find helps to make pictures taken wide open or slightly stopped down look much better.
As for build quality, I'd agree that the K series Pentax's certainly rivalled their Nikkor counter parts - but make no mistake, this fast A series 50mm is a wonderful, wonderful piece of glass and an extremely handsome looking lens. The design also includes a really useful focusing scale and you can use to set trap focus at f4 whereas the Nikkor's scale starts at f5.6.
Focussing is lovely on my version, as is the aperture selection which is notchy without being a hinderance.
I also like the low distortion which in my opinion is lower than the Nikkor's barrel distortion.
My 50mm A 1.4 lives on my KX because it is so easy to focus on its viewfinder. Even focussing off the centre prism on the grey matt area on this camera is easy with the 1.4 A. It replaced the 50mm M 1.7 that came with the KX which I could just not deal with. The M lenses are too small for me, and look silly on the KX. The bulk and handsome design of the 50mm A 1.4 means that it looks and feels at home on the KX.
I've had three 50mm A 1.4s. I should never have let any of them go.
They are consistent, well made, sharp and great to handle. They also attract some ridiculous prices on the internet - but that's the market's fault - not the lens.
A fantastic, fast, nifty fifty and a truly under-appreciated lens.
| | | | | Junior Member Registered: July, 2017 Posts: 42
6 users found this helpful
| | Review Date: May 14, 2020 | Recommended | Price: $80.00
| Rating: 10 |
| Pros: | Inexpensive, fast, sharp, low CA | | Cons: | None | | Camera Used: Pentax K-3II
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I have been using this lens strictly for astrophotography. For that purpose it is one of the best lenses I have. From f/2.5 onwards, star quality in the corners on APS-C is very good and improves modestly at smaller apertures, CA is fairly low (when focused correctly) and vignetting is minimal. Here are a several astrophotos taken with it (tracking by Astrotracer), the first at f/2.8, the second mostly at f/2.8 and the third (of Comet NEOWISE) at f/2.5.
 | | | | | Forum Member Registered: January, 2020 Posts: 91
1 user found this helpful
| | Review Date: April 13, 2020 | Recommended | Price: $90.00
| Rating: 9 |
| Pros: | Very usefull with Astrotrcer | | Cons: | | | Sharpness: 8
Aberrations: 8
Bokeh: 9
Handling: 9
Value: 9
Camera Used: Pentax KP
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They come in different prices. Mine was below everage, but not in quality. A very nice lens to suit my KP. Recently puchased a used GPS unit. So this is a greate combination in aperture and Astrotracer, allthough 50mm on a APS-C isn't quite the wide angle you want to cover the whole universe.
Overall sharpness is best from 2.8 upwards, but on 1.4 is best from the centre ± 40% radius.
I still wish for an original hood.
| | | | | New Member Registered: February, 2019 Posts: 15
1 user found this helpful
| | Review Date: February 5, 2020 | Not Recommended
| Rating: 7 |
| Pros: | Lovely image | | Cons: | "M" series equivalent is better | | Sharpness: 9
Aberrations: 8
Bokeh: 8
Handling: 6
Value: 6
Camera Used: Film
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Go with the metal "M" series equivalent and get as good images at less than half the price of this "A" Series lens. Otherwise, it's a great lens if you have cash to splash. Just make sure it handles well before you buy one and that you are not buying a less-than-smooth focus and aperture mechanism. "A" Series lenses really are prone to ageing, and shining, while the metal "M" series go on and on through time.
| | | | | New Member Registered: June, 2018 Posts: 2 | | Review Date: January 21, 2020 | Recommended | Price: $85.00
| Rating: 8 |
| Pros: | High sharpness and contrast, good build and handling | | Cons: | Lots of aberrations | | Sharpness: 10
Aberrations: 6
Bokeh: 9
Handling: 8
Value: 9
Camera Used: MX, X-T3
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Out of all the Pentax 50mm 1.4 lenses, this version is my least favorite. I think Pentax sacrificed too much in this resigned version, specifically in the aberration correction department. Compared to the previous M version, this newer version shows a lot more spherical aberrations at bright apertures which robs the image of contrast and resolution and also affects bokeh. It fringes like crazy too, there's lots and lots of purple on high contrast edges. Thankfully, these problems clear up when you close the aperture down. It's a little bit sharper in the mid-frame when compared to the previous M version, but not so much that it makes or breaks a picture. Finally, the new plastic body isn't nearly as nice as the old metal body. Other than those details I found it similar in performance to the previous version. I guess the selling point of this lens is the Auto setting which is compatible with modern Pentax DSLR's. I'd say that if you need Auto then this may be the lens for you, but if not then you should pick up the older M version.
| | | | | Site Supporter Registered: September, 2013 Location: Saskatoon Posts: 3,229
1 user found this helpful
| | Review Date: January 10, 2020 | Recommended | Price: $70.00
| Rating: 9 |
| Pros: | pleasure to manually focus, beautiful bokeh, sharp and fast | | Cons: | CA, especially at f1.4, weak contrast | | Sharpness: 8
Aberrations: 4
Bokeh: 9
Handling: 7
Value: 8
Camera Used: K-30
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I got the itch to try f1.4 photography and buying a used, manual focus lens was the cheapest way to scratch that itch. I have tried the A50 f1.7 on my camera and was happy with how it handled and performed.
At f1.4, this lens is not as sharp, but it isn't bad either. Much higher resolution images can be seen if you click on them.
Where this lens falls down compared to larger (and newer and much more expensive) lenses like the DA * 55 and DFA * 50 is in contrast and chromatic aberrations (especially at f1.4 to f2).
Nailing focus at f1.4 is hard, but the focus ring can move almost 3/4 of a turn and allows for finer adjustments than focus peaking or focus confirmation can detect. What LiveView or the viewfinder won't show you is how smooth the out of focus areas look, even at f5.6.
f1.4
f2.8
f5.6
At this point in time, I'm not planning to do studio work, my camera's AF is not very effective at wider than f2.8 and for general photography, I have this focal length covered with other lenses. For experimenting with, I am very happy with this manual focus lens.
| | | | | Banned Registered: November, 2018 Posts: 75
3 users found this helpful
| | Review Date: November 9, 2018 | Recommended | Price: $20.00
| Rating: 10 |
| Pros: | Sharp as a diamond; A-Series A+ on modern Pentax DSLR’s | | Cons: | Not actually a Leica Summilux 1.4 M 75mm... | | Sharpness: 10
Aberrations: 9
Bokeh: 10
Handling: 10
Value: 10
Camera Used: Pentax K-5, Pentax Super-A (European Camera of the Year Edition)
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If you shoot street photography on a Pentax DSLR and you don’t own his lens, you are missing out—the electronic functionality minced with the vintage optics is VERY understated on these forums. Quite possibly one of the best prime lenses manufactured.
Altogether I have 4 other Pentax 50mm prime lenses:
Asahi-Pentax SMC Takumar 55mm f1.8
Pentax-M 50mm f1.7
Pentax-M 50mm f4 (Macro)
Pentax-A 50mm f1.7
Additionally, I use the Pentax 18-55 WR (v.ii) in iffy Canadian weather.
For work, if I had my druthers, I would never take it off the camera... Fastest run and gun option for manual focus professional still photography on the ENTIRE PENTAX SYSTEM—I cannot recommend the m42 stuff as readily, as it exposes the electronics and tends to be a bit too artsy-fartsy for assignments. As for the Pentax-M series they are no joke—the internals are a facsimile of the “A” generation that followed... Yet time and time again the “A” series is much more expedient to use, with it’s utilization of the modern control dials and live metering.
Frankly, with the exception of my preconceived notions about the elusive Pentax-A 35mm f2 (a true 50mm on the crop), there is no better option in the Pentax APS-C ecosystem.
On the critical side, every time I make the mistake of trying to take it off of the camera, I cut myself on it...
| | | | | New Member Registered: October, 2013 Location: Naples Posts: 10
1 user found this helpful
| | Review Date: September 26, 2018 | Recommended | Price: $60.00
| Rating: 8 |
| Pros: | Great Colours, very sharp and contrasted with lens hood from f2, great bokeh | | Cons: | Needs a lens hood from 1.4 to 2.8 to be sharp and contrasted, some CA | | Sharpness: 8
Aberrations: 7
Bokeh: 9
Handling: 9
Value: 8
Camera Used: k5 - pentax film srl
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This SMC 50mm A 1.4 is not so good as his great ancestor. the SMC Super Takumar K, as all the M series prime compared to K series and some Takumar are a step back because of being smaller (more compromise) and not radioactive (less contrast)... but it is a good performer if well used. And well used means 2 things:
- a proper lens hood from f:1.4 to f:2 - (on APSC it should be the lens hood suitable for a 75mm)
- from f:2.8 also without a nens hood
...because from the M series pentax's engineers started to design and calculate optical schemes of pentax lenses with lens hood as a permanent part of the project and not as an optional for "counter light" shots... and if it's true for all pentax lenses, in this and other 1.4 pentax prime it's even more important, counsidering the great aperture.
If you put a proper lens hood this lens, in EVERY SHOT between f 1.4 and 2.8, you gain some "stop down" of performance:
- 1 stop of sharpness and contrast at the center and 2 stop at the edges and corners, at F: 1.4
- half stop at center and and one stop at edges at f2... and one stop and a half at corners on film
- a bit less improve at 2.8 and on APSC Digital slr.
From f4 on film and from f2.8 on apsc digilal, there is no more need of a hood, it improves only a bit in the corners of the frames or with a light source inside the scene.
Without a lens hood this lens is a bit too soft at edges and lacks of contrast from 1.4 to 2.8 (and to f4 in the corners on film)... so, it's perfect for portrait or dreamy effect... but may be not so good in other shots. On APSC there is less evidence of this behaviour because of the crop factor (the edeges are out of the picture), but on film it's very evident and harder to correct. But on APSC, the crop factor that gives you 75mm of view, the center sharpness and the great "soft transition" to the edge, with the great colour rendition similar to the stellar Takumar SMC 50 1.4, yuo can shot wonderfull portraits with this lens. That's why I got it (and also at a small price).
Colours are great, micro-contrast too, bokeh is very very good (as others 1.4 50mm), tone to tone transition are very pleasant, and SMC works well from 2.8.
Some vignetting on film, not on APSC. Some Chromatich Aberrations (purple fringing), some flares and lack of contrast until 2.8 with light source in the scene.
| | | | | Junior Member Registered: January, 2013 Location: Texas Posts: 32 | | Review Date: November 28, 2017 | Recommended | Price: $165.00
| Rating: 9 |
| Pros: | Well built, Light, I.Q. similar to the best | | Cons: | None | | Sharpness: 9
Aberrations: 9
Bokeh: 9
Handling: 10
Value: 10
Camera Used: Pentax K70, KP
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This lens is well built, has a smooth focusing ring, and it is among the sharpest 50/1.4. The Canon FDn and Contax Zeiss are a little bit sharper at 1.4, but not anymore at 2.0 and above. The Nikon AIs at 1.4 is a little bit inferior. Colors and flare resistance are second to none. Compared to the Pentax 50/1.7 A, as expected, the 50/1.4 is slightly less good at full aperture (1.4 versus 1.7) but still usable, a little bit better at 2.0, equivalent at 2.8 and above. Vignetting is visible but negligible on an APS-C digital camera.
| | | | | amateur dirt farmer Registered: December, 2014 Location: probably out in a field somewhere... Posts: 41,766
3 users found this helpful
| | Review Date: November 3, 2017 | Recommended | Price: $90.00
| Rating: 9 |
| Pros: | color rendition, clarity, sharpness, bokeh, handling | | Cons: | nothing | | Sharpness: 9
Aberrations: 9
Bokeh: 9
Handling: 10
Value: 9
Camera Used: K-3, K-50
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purchased used and recently CLA'd by Advance Camera (highly recommended) due to wear and tear, she came back to me in fine fettle...
the A50/1.4 is a bit heavier and larger than the A50/1.7 it is regularly compared to, but not negatively so... it's still a smallish prime on your camera that gives you a utilitarian focal length, A-ring convenience, and a large 1.4 aperture should you need it...
nothing but positive aspects to this lens - color rendition, clarity, bokeh, handling - all are aces for me... add a small hood on the end of her and leave her on the camera....
I like the slightly longer barrel of the 1.4 vs the 1.7; to me it gives the lens a small advantage in handling and eases the use of the focus ring... the 1.4 has given me the thought to sell off my A50/1.7 since I like the handling, color, bokeh, and sharpness so much more...
but the pictures....
 snickerdoodles by Pepperberry Farm, on Flickr
 color in the garden by Pepperberry Farm, on Flickr
 zinnias by Pepperberry Farm, on Flickr
 light-trails and starbursts by Pepperberry Farm, on Flickr
 orb weaver by Pepperberry Farm, on Flickr
and the rest of my album for this lens:
https://www.flickr.com/photos/pepperberryfarm/albums/72157680930924384/page1
so - as a Nifty Fifty, definitely a lens to keep in your bag/on your camera....
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