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SMC Pentax 300mm F4 Review RSS Feed

SMC Pentax 300mm F4

Sharpness 
 8.5
Aberrations 
 6.3
Bokeh 
 8.1
Handling 
 7.7
Value 
 9.0
Reviews Views Date of last review
35 173,117 Fri April 7, 2023
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Recommended By Average Price Average User Rating
94% of reviewers $201.91 7.74
SMC Pentax 300mm F4

SMC Pentax 300mm F4
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SMC Pentax 300mm F4
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SMC Pentax 300mm F4
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SMC Pentax 300mm F4
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SMC Pentax 300mm F4
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Description:
This original K-Mount 300mm lens is much heavier than its M* counterpart which was introduced later.



SMC Pentax 300mm F4
© www.pentaxforums.com, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Diaphragm
Automatic, 8 blades
Optics
7 elements, 5 groups
Mount Variant
K
Check camera compatibility
Max. Aperture
F4
Min. Aperture
F32
Focusing
Manual
Min. Focus
400 cm
Max. Magnification
0.09x
Filter Size
77 mm
Internal Focus
No
Field of View (Diag. / Horiz.)

APS-C: 5.5 ° / 4.6 °
Full frame: 8.2 ° / 6.9 °
Hood
Built-in, slide out
Case
Dedicated hard case
Lens Cap
Plastic clip-on
Coating
SMC
Weather Sealing
No
Other Features
Diam x Length
85 x 188 mm
Weight
1020 g
Production Years
1975 to 1981
Engraved Name
SMC PENTAX 1:4/300 (early version), smc PENTAX 1:4 300mm (later version)
Product Code
24340
Reviews
User reviews
Variants
Like many other K-mount lenses: Introduced in 1975 with the early K-mount naming style: SMC PENTAX 1:4/300. Later, when the M series lenses came out, lenses were either replaced with an M lens, or, like this one, renamed to follow the new neming style: smc PENTAX 1:4 300mm
Features:
Manual FocusBuilt-in HoodAperture RingFull-Frame SupportDiscontinued
Price History:



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Loyal Site Supporter

Registered: June, 2013
Location: Utrecht
Posts: 255

5 users found this helpful
Review Date: October 26, 2019 Recommended | Price: $100.00 | Rating: 8 

 
Pros: Superb build quality, manual focussing, sharp, bokeh
Cons: Abberations, only hand hold shots
Sharpness: 9    Aberrations: 7    Bokeh: 10    Handling: 7    Value: 9    Camera Used: K2 to K1ii   

This lens feels so solid, beautiful crafted lens. It is real sharp when you focus with live view, the DOF is very narrow. Water shots in bright light have to be corrected because of the green/magenta aberations in front and behind your object. In that sort of situations the aberations help you in pin point focussing, the narrow area without aberations is in focus... . Aberations are easy to correct on post btw. Stopped down this lens is very sharp. Very nice focus throw also.

On K-01 :







On K1ii :



Edit Feb 2021: I compared K300 / A400 / Tokina RMC400 in ideal situation on 24 MP Pentax KP. Resolving power is quite good, only aberrations around blinking objects are an issue.





   
Forum Member

Registered: February, 2015
Posts: 93

3 users found this helpful
Review Date: August 7, 2018 Recommended | Price: $140.00 | Rating: 9 

 
Pros: Build quality, IQ
Cons: A bit large, but still acceptable
Sharpness: 10    Aberrations: 10    Bokeh: 9    Handling: 8    Value: 10    Camera Used: K2dmd   

Don't listen to the so so reviews of this lens if you're shooting film, which is what this beautiful thing was made for.
I just picked one up and ran a test roll of HP5, tortured it and I don't see any weaknesses at all.
This wasn't made for digital so you can't expect it to behave like it was. After seeing what it can do I'll never sell it.
It is large but the images it produces nullify that particular shortcoming. I found the focus throw to be about right also.
I'd give it a 9.5 but there's no provision for that
   
Senior Member

Registered: May, 2011
Location: Marseille Provence
Posts: 150

3 users found this helpful
Review Date: April 1, 2015 Recommended | Price: $200.00 | Rating: 9 

 
Pros: Full-Frame, Full-Metal, Easy Focus, Sharp, Colors, Price, No AF issue, Eternally Sustainable !
Cons: Green / Magenta fringes in OoF High-Contrast zones, far Close Focus, No Tripod Mount
Sharpness: 9    Aberrations: 7    Bokeh: 9    Handling: 8    Value: 10    Camera Used: Pentax K-5   

Hi All !

The 40 yrs old SMC Pentax 1:4/300 is a * bargain * as long as you avoid shooting against the light !

Sat. March 28 at circuit Paul-Ricard = first practice session of the 2015 WEC :
- LMP1 Audi R18 #8 - GTAm Ferrari #66 - LMP2 Morgan-Sard #43
( Right Click + View Image to pixel-peep it at full size ! )
.

.
Focus is on ~the front of the Audi, 1/800s, f/8, ISO-200, pp DCU4 as is, No CA Correction !
= you can see some fringing on the slightly OoF air intake of the blue Morgan...
this picture is ~1/4 of the area of the original PEF (logos=100%)
.

Here is a rare Review of this SMC Pentax 1:4/300 :
https://www.photoinfos.com/Fototechnik/Objektive/Pentax-SMC-K-300mm.htm
+ the way to read it all around the world :
https://www.translatetheweb.com/
.

- LMP2 Alpine Nissan #36 - LMP1 AER ByKolles #4 - LMGT Aston Martin Vantage V8 #99
Right Click + View Image to pixel-peep this one up to 2048 × 1408 pixels !
.


Focus is on ~the front of the Bykolles, 1/800s, f/7, ISO-200, pp DCU4 as is, No CA Correction
This Large picture is ~2/3 of the area of the whole Original PEF frame...

Both photos : K-5 - Manual Exposure setting + Manual Focus + Single Shot mode !

Good Luck to find your own SMC Pentax 1:4/300 !
   
Veteran Member

Registered: January, 2012
Posts: 1,972

3 users found this helpful
Review Date: May 3, 2014 Recommended | Price: $190.00 | Rating: 9 

 
Pros: sharpness, focusing and overal handling
Cons: color fringing and no tripod mount !!!
Sharpness: 10    Aberrations: 6    Bokeh: 10    Handling: 10    Value: 9    Camera Used: K-01   

I bought it to accompany or to replace my massive Meyer Orestegor 300mm and I did a comparison of those two - which you can see from the following link here on Pentax Forums : https://www.pentaxforums.com/forums/122-lens-clubs/55946-300mm-plus-lens-club...ml#post2800845

Just to quickly sum up - the lens is having a really good sharpness - I was surprised that even wide open the details was there - even in very contrasty situations ( like in the comparison linked ) - so basically i rate this lens fery high on sharpness.

The aberrations on the other hand ARE the problem and on certain situations they will ruin your shot. Meyer is performing much better in this area. The worse news is that Pentax doesn't quite stop color fringing even when I stop the lens down - after f8 it is nearly gone - but not fully, so watching out for this flaw is important and this lens will not deliver in every situation.

Handling is superb - lens feels very solid, focusing is superb and aperture flawless . The only gripe is the lack of tripod collar or mount - and that is making using this lens on tripod a bit awkward. Shame Pentax !!

I went through several cheap 300-400mm lenses and the very first one that I was very happy about was Meyer. Now I can see how Pentax will take its place for hand-held use and Meyer will stay at home or be only used with tripod .

Very happy with this lens and I would recommend it to every Pentax user. If you can live with / or fix in PP this awful color fringing -you will be very happy with what this lens is capable of - a very competent performer indeed !

I would personally rate this lens 8 for digital and 9 for film use - as the color fringing is less of an issue there . Since we don't have 0.5 marks here I went with 9 for it - although for both digital/film use I would rate it 8.5.

if it had a tripod collar - that would be a solid 9 - and if fringing was not that prominent - that would be a solid 10 for the money- but then the lens would be selling for much more I guess :P

Below several shots from this lens - at f4 f8 and the bokeh wide open :

Pentax K 300mm f4.0
SMC K 300mm - bokeh @ f4.0

PS: here is how SMC K 300mm looks against my Meyer Orestegor 300mm f4.0

SMC K 300mm against Meyer Orestegor 300mm
   
New Member

Registered: November, 2010
Posts: 5

3 users found this helpful
Review Date: April 15, 2013 Recommended | Rating: 8 

 
Pros: Build, IQ
Cons: Weight
Sharpness: 9    Aberrations: 7    Bokeh: 9    Handling: 8    Value: 10    Camera Used: K5   

This is my longest lens. I primarily use it for birding. I routinely mount it to the Sigma APO 2X AF Teleconverter and get good results. It takes a lot of practice and some luck to get birds in flight due to the shallow DOF. It is built like a tank. I dropped it once onto a carpeted floor from a height of five feet. One of the lens mount's flanges was bent, but I replaced that myself using a spare mount I had. The only other damage was to the aperture mechanism, and that was fixed by a minor readjustment which was done by a repair shop. Nothing else was broken. The tech said one of the newer mostly plastic lenses would have had broken lens mounts from such a fall.

It is a sharp lens, and when I get the focus right, it produces excellent images. Below is a hummingbird photo I took at my backyard feeder. The bird was about 10 feet away and I used a 24mm extension tube to get the lens to focus at this closer then normal distance. 300mm, F8, fill flash, 500 ISO, K5 on X setting. Some noise reduction and exposure adjustment was done in Photoshop Elements. This is a cropped image that is as close to 100% in size as I can approximate.

I took one of the previous reviewers advice and purchased a Canon aftermarket Tripod Ring on eBay. On the ring it says A(W) Micro 100 F2.8. It fits the 300 4 perfectly and I have kept it on the lens ever since. It mounts securely to the lens between the aperture ring and the focus ring and it balances the lens and my K5 perfectly. I no longer have to worry about this heavy lens damaging my camera body when mounted on a tripod, especially when I have the 2X converter attached.

I would like to add that I use a Katzeye focusing screen in my K5 and would highly recommend it when using MF lenses. I once tried to get a photo of a Redtail Hawk in a tree, using this lens and the Sigma teleconverter, and only one out of a dozen photos was in focus. On that same outing I found a Heron hunting frogs in a tidal canal. Only a couple of my photos turned out, no matter how hard I tried to get the focus right. That was when I out and acquired a K5 with a Katzeye. I now wouldn't think of using this lens without it. I believe a Katzeye is a mandatory requirement when using long MF lenses.

Another thing I discovered that when taking a photo at 600mm, you need a quality filter. I tried one of those cheap UV Vivitar filters you find on eBay for less than ten dollars. At 600mm, you could see wavy lines in the viewfinder. The image was so distorted, it was impossible to take a useable photo. I immediately put a quality B&W UV filter on this lens and now get great results.

   
Site Supporter

Registered: October, 2008
Location: Vancouver, Canada
Posts: 8,093

3 users found this helpful
Review Date: August 23, 2009 Recommended | Price: $280.00 | Rating: 8 

 
Pros: Quality, built-in hood, decent optics for a super telephoto.
Cons: Slow maximum aperture of f4, a little heavy.
Camera Used: K Series film bodies (K1000, KM, KX, K2, K2DMD)   

The K300/4 is the last in focal length of the Pentax K series telephoto lenses, which you can hand hold and have open aperture metering. The K400/5.6 and above all need to be used on a tripod and require stop-down metering.

The lack of a tripod mount is not an issue for me, as I bought this lens for its mobility. If I’m going to lug my tripod out, then I’ll take my K400/5.6 instead.

The K300/4 has a good optical design for a super telephoto and is quite sharp when used in close-ups of birds or other things. CA or purple fringing has not been an issue for me as a film user. The K300/4 has a 77mm filter diameter and I do recommend a good UV filter or polarizer when using this lens. The K300/4 also has a built-in hood which is nice, even though it could be of better quality.

The K300/4 has a maximum aperture of f4 which is somewhat slow for a hand held telephoto; this is where the K200/2.5 excels. The K300/4 is not a lens for indoor or low light situations.

Overall a good well built super telephoto lens that is somewhat portable, but on the slow side. I would have given the K300/4 a 9 if it had been a little faster, like a f3.5 and if it was a little lighter like the M or A versions.

Sample shots taken with the K300/4. Photos are medium resolution scans from original negatives.

Camera: K2 Film: Kodak Portra 400VC ISO: 400





Camera: K2 Film: Kodak Portra 400VC ISO: 400

   
New Member

Registered: November, 2017
Location: Lake Worth, Florida USA
Posts: 3

2 users found this helpful
Review Date: June 22, 2020 Recommended | Price: $127.00 | Rating: 9 

 
Pros: Very high quality for an excellent price. Terrific results if you work with it's limits.
Cons: Soft wide open
Sharpness: 8    Aberrations: 7    Bokeh: 9    Handling: 10    Value: 10    Camera Used: Pentax K1   

I bought my lens for only $127 and didn't use it much initially. I use it on a Pentak K1 and lately started experimenting again with it.

It is fairly soft wide open, but stopping the lens down will result in some sharp photographs.

Purple fringing is obvious under certain circumstances, but that's easily remedied in post production.

The construction is built like a tank and will be working long after I leave this place. The focus is smooth. The overall feel is well balanced with my K1.

If you have a K1 or other similar camera with excellent high ISO capabilities and image stabilization then this lens is a no brainer and should be part of your collection.

   
Inactive Account

Registered: March, 2014
Posts: 3

2 users found this helpful
Review Date: March 6, 2014 Recommended | Price: $340.00 | Rating: 10 

 
Pros: built quality, colours, sharpness
Cons: Slow maximum aperture of f4, a little heavy
Sharpness: 10    Aberrations: 9    Bokeh: 9    Handling: 10    Value: 10    Camera Used: Pentax K-01   

At 300mm on film and 450mm on digital the Pentax K 300/4 is my second longest lens as I recently added a SMC Pentax M 400/5.6 to the collection. While it is not a lightning fast 300/2.8 it is no slouch either. When you put a 2x converter on the back of this beast and you have a 600mm film/900mm f8 on digital! How is that for an extreme telephoto? For those of us to whom photography is just a hobby it is unlikely we will ever be able to afford or justify that 600mm f4 lens.

Overall a good well built super telephoto lens that is somewhat portable, but on the slow side.
   
New Member

Registered: January, 2012
Location: France
Posts: 9

2 users found this helpful
Review Date: April 14, 2012 Recommended | Price: $270.00 | Rating: 9 

 
Pros: sharpness, color,used without tripod
Cons: application knowledge in post processing, minimal focusing
Sharpness: 10    Aberrations: 5    Bokeh: 9    Handling: 9    Value: 10    Camera Used: K-5   

Hello all,
I possess a K300mm f4 for a week.
I usually to wait longer before giving my opinion on a lens, but I think I can bring some information on this post.
First a 300m f4 manual is never very easy to use, again, it is true that this old lens is not optimized for digital camera.
For someone who want a JPG ready, and not doing a post-processing, ignore my comment as a DA 55-300mm may be more suitable.
1) the build quality is uncompromising.
2) the weight of this lens is similar to that of DA 300mmF4. I use it without tripod on my K-5.
3) focus takes a little practice, but the ring is very precise.
the minimal focusing distance of 4m is a little weak
4) the k-5 viewfinder remains luminous because F4 is a good compromise (300mm f2,8 is probably too big and heavy).
5) the sharpness is very good has F4, extraordinary by closing the diaphragm.
6) The contrast is very good, and asked to be adjusted as usual cases.
7) the colors are balanced and faithful to reality.
8) the bokeh is superb (silky and soft).
9) the chromatic aberrations beings are often corrected, good softwares of Treatment solve the problem very often (I developed my SILKYPIX RAW DSP DSP 4 or 5.)
In conclusion, for an affordable price, here's a lens that give exceptional results. You need a little practice to master the subject and some knowledge in post processing.
   


2 users found this helpful
Review Date: January 30, 2011 Recommended | Price: $250.00 | Rating: 8 

 
Pros: Sharp, not so heavy for a 300 mm F4
Cons: Serious CA, no tripod mount

Hello !
I possess this lens for several years, and it was always in my bag when I photographed with 135 rolls. Regrettably, its debuts in numerics been disappointing on my K10d. As written higher, the chromatic aberrations were very too important in conditions of strong contrast.
But now, it is very different.
With the new softwares of treatment of the RAW files, we can completely eliminate them. I use "DxO Labs Pro" and I have made a special profile for this lens (A friend has done the same method with "LightRoom"). From F4, the image is very sharp, because of the reduction of the purple fringes for every micro-detail. For example, you can see the photo below of a baby mumble in Alps, shot at 10m range and wide open.
For the absence of tripod mount, it is not any more a problem either: I have found a ring, made in china for some $, which fits itself perfectly. It is a ring for a "Canon EF 100 F2.8 USM", that is stiff enough :
[IMGWIDE]http://cgi.ebay.fr/Tripod-Mount-Ring-Lens-Collar-F-Canon-EF100mm-F2-8-USM-/260664843322.
I also have a DA 55-300 for travel. But when the weight is not a problem, I prefer my SMC 300 F4 which has a very better softness for background.






   
Senior Member

Registered: April, 2008
Location: Pune, India
Posts: 149

2 users found this helpful
Review Date: June 13, 2008 Recommended | Price: $250.00 | Rating: 8 

 
Pros: Extremely sharp lens even wide open..U get a 450mm/4 for $250..
Cons: No tripod mount.

This lens is magic..

It will never dissappoint u..

Get used to its cons of

1. Weight (Any 300/4 will weight around a kilo..)

2. No tripod mount (Shoot handheld OR prepare a mount like this one made by Mr. Lowell Goude Or buy a lens support like Manfrotto Telephoto Lens Support MN293)

3. Needs caliberation when stopped down with DSLRs (Now do few calculations once and for all n remember them..+point- nobody else can meter it without u!

4. Manual focus ( Oh come on...Learn to focus manually, thats all I can say..perhaps here's a link which might help u..http://www.naturephotographers.net/mptip3.html )

5. Minor issues of Purple Fringe, but way better than the popular Tamron 70-300..(CAn be edited with S/w)

Actually they aint cons, they are simple limitations of a 30+ year old technology...Overcome them n u have a friend for life..

It build quality is superb..(actually I didnt notice for long as it was the only lens I had with FA 50/1.4..once when a friend of mine showed me his digital 70-300 plastic n subsequent intro to digital lenses then I realised the quality of its built)

When I add the 2x teleconverter, it becomes whopping 900mm/8...Now thats something, especially with Pentax DSLR's SR..I have taken usable snaps of kingfisher with this combo handheld at 1/9 at ISO400...

here's a link of a photo uploaded specially for this review..

(Non working link removed)

You can find the exif data here (Non working link removed) please read the description written over there, so me not writting it over here..

I highly recommend this lens..it is one of the reason I chose Pentax over other more popular brands (no compulsion to name them as no prizes to guess them!)

I would want somebody to compare it with the DA 300/4..

If at all I trade this lens, it will be for a 70-200/2.8 zoom..certainly not for another prime telephoto lens (may be a 300/2.8)

Hope u find a copy soon..Or wait for me to sell mine..keep in mind, I'll never sell it for less than what I purchased it for (if not greater!)..
   
Veteran Member

Registered: February, 2008
Location: Waterloo, Ontario
Posts: 4,461

2 users found this helpful
Review Date: February 18, 2008 Recommended | Price: $200.00 | Rating: 8 

 
Pros: Sharp, contrasty, superior build quality
Cons: Fully manual, no tripod collar, heavy, prone to purple fringing
Sharpness: 9    Aberrations: 5    Bokeh: 8    Handling: 9    Value: 10   

At 300mm on film and 450mm on digital the Pentax K 300/4 is my second longest lens as I recently added a SMC Pentax M 400/5.6 to the collection. While it is not a lightning fast 300/2.8 it is no slouch either. When you put a 2x converter on the back of this beast and you have a 600mm film/900mm f8 on digital! How is that for an extreme telephoto? For those of us to whom photography is just a hobby it is unlikely we will ever be able to afford or justify that 600mm f4 lens. The 300mm/2x rear converter combo at least allows me to dabble in the super-telephoto realm in an economical manner.

At F 4 the Pentax K 300mm is reasonably fast and provides sharp contrasty images. In good light it can be hand held (just) but depth of field is very shallow. You will never get the best from this, or any other lens for that matter, unless you use a tripod. As others have noted above the lack of a tripod collar is a problem here due to the front end weight of the lens. If you use this lens on a tripod long enough it is just a question of time before it does a nosedive into the ground. This doesn’t have to be a showstopper however. I had a collar made at a local machine shop for about $75.00. The result was perfect balance on the tripod with both my K10 digital and K2/MX film cameras. I have used this lens for birding and found it not quite long enough without the rear converter. It is an excellent focal length for baseball and football games. The K 300/4 is not an action stopping auto focus by any means but can still deliver quality images if you work on your manual focusing technique. The K 300mm takes 77mm filters which can be expensive and also adds a bit to the front end weight.

[edit Dec. 2008]

Others have noted the weight of this lens (1020 grams/2.25 lbs) and the need for a tripod mount. I had one made by a machinist friend especially for this lens from 1/4 inch thick aluminum. This allowed ample space to mill a slot for the white alignment pip. It now balances perfectly on my tripod and dramatically improves lens performance.



If you have this lens consider getting a commercially made product or have a tripod collar made. It really benefits from a tripod mount.

Others have noted CA/purple fringe issues with this lens and they can be a problem in certain high contrast conditions. Klaus Schiroff of Photozone in detailed testing of the Pentax K 135/2.5 has noted:

"Low CAs were surely no design objective in the late 70s so it isn't really surprising that this is a weakness of this old lens (K 135 f 2,5) . CAs (colour shadows at harsh contrast transitions) can be fairly visible at times with an average pixel width around 1.3px at the image borders."

http://www.photozone.de/Reviews/Pentax%20Lens%20Tests/143-pentax-smc-k-135mm...report?start=1


It is certain Klaus spent a lot more time thinking about this than I ever will or intend to. The Pentax K 300mm f 4 is from the same 1970s design era as the K 135/2.5 and it does share this same CA trait. The same can be said of many modern lenses. The bottom line is this lens can still deliver great images but has some limitations.


Focusing the K 300/4 is smooth if a bit slow with the large checked rubber focusing ring providing a sure grip. You will have to turn through almost 360 degrees from the closest focusing distance to infinifty. In typical Pentax K series style focal length, lens speed, serial number etc. is engraved on the retaining ring which surrounds the front element. A built-in lens hood is included. Consequently, the hood is easy to find and it is nice not to have to purchase one as an optional attachment. Boz Dimitrov's Pentax site provides further technical details on this lens for the curious:

http://kmp.bdimitrov.de/lenses/primes/extreme-tele/K300f4.html

Metering on digital is stop-down only with no AF and you will find no aperture reading in the viewfinder. Viewfinder brightness, while not a problem on my K2 or MX film cameras, seemed a bit dim to me in the finder of the K10 digital. This concern was resolved on the K10 when I added a Katz Eye focusing screen. The Katz Eye screens are expensive but if you have a bag full of old Pentax glass, as I do, it may be worth the investment. The horizontal split prism with optibright really made a difference for me with this and other lenses on the K10. Like every other K series lens I have seen the Pentax K 300/4 is superbly constructed. No cheap plastic bits to be found here. Dollar for dollar this lens might be the best value in the 300mm range on the used market. It is a fine optic for film cameras and if you can live with the limitations of a fully manual lens on your digital camera it should serve you well in that format as well. Here's a couple of recent shots from this lens:

Queen Ann's Lace



American Goldfinch

   
Site Supporter

Registered: January, 2007
Location: Toronto
Posts: 17,892

2 users found this helpful
Review Date: February 2, 2007 Recommended | Price: $300.00 | Rating: 9 

 
Pros: Good Speed and works with the 1.7x AF Adaptor
Cons: No tripod mount, but see below

I see comments about lack of a tripod mount. This can be fixed with a little imagination, and some 1/2" x 1/8" and 1" x 1/8" aliminium bar stock. I managed to make a tripod mount which had a ring to capture the lense, and screw to the base of the camera, making the combination mountable. The geometry changes for each camera model as the lense centerline to camera base changes. My mount also was designed on inserting the 1.7x autofocus adaptor to give a 500mm F6.7 autofocus lense.

This mount also includes an integrated snap in to the Monfretto 486 quick releas ball head

Regardless of what all the camera manuals and the autofocus adaptor state about the adaptor working only witl lenses F2.8 and faster, I have never had a problem with any F4.0 lens, on any of my autofocus SLRs, which include a PZ-1, an *istD and the K10.

https://www.pentaxforums.com/gallery/index.php?n=849
   
Junior Member

Registered: December, 2019
Posts: 41

1 user found this helpful
Review Date: December 31, 2019 Recommended | Price: $70.00 | Rating: 8 

 
Pros: handling, simplicity, build quality in-hand
Cons: no tripod ring
Sharpness: 8    Aberrations: 7    Bokeh: 9    Handling: 8    Value: 10    Camera Used: MX, 5dmkII   

Bought along with a M 50/1.4 for $110 combined; asking price was $80 each. Purchased copy was in decent condition optically and externally but had a relatively stiff (though smooth) focusing ring and a dented lens hood that takes some finesse to extend.


I think the people who don't like it either have unrealistic expectations for MF film-era lenses or paid too much for it.


Cons:
-Not ultra sharp at F4
-weighs more than a modern plastic/composite/computer-designed 300/F4
-focus throw is very long
-No tripod ring
-300mm prime is too long to be very useful on a crop-sensor
-Fringing, especially at F4


Pros:
-Sharpens up nicely by F8 (aberrations stay somewhat)

-incredibly sturdy
-focus throw is very long (useful for fine-tuning focus)

-surprisingly good in-hand, especially with a modest-sized film camera attached (paired kind of wonderfully with my MX)
-300mm is great on a full-frame sensor or film


300/F4 at F8, 1/250th on a Pentax MX. Portra 800 in EV11-ish (maybe more like 10.5-10) conditions.

It's not a good sports lens. Hunting for focus across its full focus range is not fun. It's a nice budget complement to more "normal" lenses, but it's definitely not a replacement for them. it's also just small enough that I can fit it into my camera bag as part of my typical carry; I like how it gives me a completely different perspective on subjects from what I get from, say, a 50mm, and at F4 it's bright enough for mixed light situations, though it really does shine only during the day (largely because of the lack of a tripod mount). I've also used it with a 50mm screwed on front for a 6:1 macro, which is a unique look.

All told I'd probably be disappointed if I'd paid $300 for it today but I wouldn't own it if it was a $300 lens.
   
New Member

Registered: February, 2016
Posts: 2

1 user found this helpful
Review Date: October 11, 2018 Recommended | Price: $35.00 | Rating: 8 

 
Pros: Solid, good focus throw, very sharp when stopped down
Cons: CA to f8,
Sharpness: 8    Aberrations: 5    Bokeh: 6    Handling: 7    Value: 8    Camera Used: k-3   

I love these legacy lenses! I have the 200 f4, 300 f4 and the 500f4.5. I just need the 400 to complete the tele collection.

It's not super fast but the focus throw is really good.

I got it at a church sale for $50CA and it is in new condition. I'm loving this lens!
Add Review of SMC Pentax 300mm F4



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