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SMC Pentax-DA* 300mm F4 ED [IF] SDM Review RSS Feed

SMC Pentax-DA* 300mm F4 ED [IF] SDM

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81 360,697 Thu August 3, 2023
Recommended By Average Price Average User Rating
98% of reviewers $1,034.58 9.56
SMC Pentax-DA* 300mm F4 ED [IF] SDM

SMC Pentax-DA* 300mm F4 ED [IF] SDM
SMC Pentax-DA* 300mm F4 ED [IF] SDM
SMC Pentax-DA* 300mm F4 ED [IF] SDM

The Pentax DA* 300mm telephoto lens features weather-sealing as well as Pentax's SDM focusing technology. It has a removable tripod mount.

SMC Pentax-DA* 300mm F4 ED [IF] SDM
©, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Automatic, 9 blades
8 elements, 6 groups
Mount Variant
Check camera compatibility
Max. Aperture
Min. Aperture
AF (in-lens motor or screwdrive)
Min. Focus
140 cm
Max. Magnification
Filter Size
77 mm
Internal Focus
Field of View (Diag. / Horiz.)

APS-C: 5.4 ° / 4.6 °
PH-RBK 77 mm
Lens Cap
Weather Sealing
Yes (AW)
Other Features
AF/MF Switch,Tripod Mount
Diam x Length
83 x 184 mm (3.3 x 7.2 in.)
1070 g (37.7 oz.)
w/ Hood: +90g
w/ Tripod Foot: +80g
Production Years
2008 to present (in production)
$1096 USD current price
Engraved Name
smc PENTAX-DA* 1:4 300mm ED [IF] SDM
Product Code
User reviews
In-depth review
Unofficial Full-Frame Compatibility Tests by Pentax Forums
★★★ Full coverage at all tested F-stops and all focal lengths
Show details
Two ED elements.
Designed for APS-C but officially full-frame compatible per Ricoh. The Pentax K-1 includes full-frame correction profiles for this lens.

Screwdrive AutofocusSupersonic AutofocusQuick ShiftWeather SealedInternal FocusingAutomatic ApertureFull-Frame Support
Purchase: Buy the SMC Pentax-DA* 300mm F4 ED [IF] SDM
In-Depth Review: Read our SMC Pentax-DA* 300mm F4 ED [IF] SDM in-depth review!
Sample Photos: View Sample Photos
Price History:

Add Review of SMC Pentax-DA* 300mm F4 ED [IF] SDM Buy the SMC Pentax-DA* 300mm F4 ED [IF] SDM
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Site Supporter

Registered: October, 2006
Location: North Face of Mount Shasta
Posts: 120

3 users found this helpful
Review Date: March 10, 2018 Recommended | Price: $600.00 | Rating: 10 

Pros: Sharp at all apertures, Realistic Contrast, Distortion free, Excellent focus accuracy, Fast
Cons: None worth mentioning
Sharpness: 10    Aberrations: 9    Bokeh: 9    Autofocus: 9    Handling: 10    Value: 10    New or Used: Used    Camera Used: K3   

All you have to do is read a few reviews here about this lens to understand just how competent it really is. The listed cons about it are almost non-existent.
What I will tell you though, is just how much confidence this lens has given me. It never ceases to amaze me that I'm capable of images of such quality. I would of been hesitant to tell anyone that great equipment will make you a great photographer ... however, for me, this lens comes pretty close.

Veteran Member

Registered: May, 2008
Location: Bluffton, SC
Posts: 674

4 users found this helpful
Review Date: March 5, 2018 Recommended | Price: $800.00 | Rating: 9 

Pros: Excellent build, Colors, Contrast, Sharpness
Cons: lack of focus limiter
New or Used: Used    Camera Used: K3 II   

I recently decided to add Pentax to my kit for wildlife photography. I have used several lenses in this range in the past from Canon and Sony including Canon 70-300L, Canon 100-400L, Canon 400 f/5.6L and Sony 70-400G. I don't think that the Pentax lenses loses anything to these lenses in real world photography.

I have been pleased with the lens so far. The build quality is truly excellent and rivals any of the manufacturers. I feel more confident in the weather sealing of this lens compared to anything I've used and I have no complaints at all. With this comes a little bit of weight, but it is actually reasonable for being a 300 f/4 lens. I think that being able to have the robust construction with weather sealing is worth a little bit of extra weight. The lens mounts tightly to the camera with zero play whatsoever. It also mates well with the HD DA 1.4X TC and you can't even tell that it's on there. I'll write a separate review for the TC later, but this is a perfect match to add extra reach.

Sharpness is useable right from wide open. It's slightly better stopped down, but you only have to for depth of field differences. The lens also has very nice contrast and colors making post processing quick and easy. I did a little bit of chromatic aberration torture testing in harsh light on a flower and I didn't see any issues, even with the TC installed. I would say that this is a non-issue in real world conditions. Lighting too harsh for the lens would likely be too harsh to make decent photos anyway.

Autofocus is "good." It reminds me of the 100-400L or 70-400G from Sony. A little bit sluggish to go throughout the whole range, but reasonable fast and smooth. Focus tracking seems fine as well, although I haven't done extensive testing. I feel like a focus limiter would have been very beneficial on this lens, but it's not a deal breaker. I would recommend trying to prefocus on a nearby subject ahead of time if possible. This is probably the weakest area of the lens, but it's actually a little better than I expected after reading reviews and reports.

Overall this is a great lens that won't let you down. Pentax owners should be proud to have such a great lens available.

flower2 by Daniel, on Flickr

red dragon by Daniel, on Flickr

evening prance by Daniel, on Flickr

flying great egret by Daniel, on Flickr
Forum Member

Registered: July, 2015
Posts: 53

5 users found this helpful
Review Date: February 3, 2017 Recommended | Price: $750.00 | Rating: 9 

Pros: size, sharpness, build
Sharpness: 10    Aberrations: 9    Bokeh: 9    Autofocus: 7    Handling: 10    Value: 10    New or Used: Used    Camera Used: K3 II   

Got it as early Christmas present for myself. Didn't have much chance to use it due to weather being rubbish, but when I could finally go out with it: wow.

IQ is amazing, even with HD converter. Sharp like my grandpas cutthroat razor.
You need to learn how to use it though. For birding forget SR, go for high shuter speed, high ISO and stop down 2/3 stop (with converter) and you can count feather strands even on small and fluffy birds.

Could be faster focusing, especially if it decides to go wrong way first.

DA 300 + HD converter, no crop, f7.1, 1/640s, ISO 4000
20170203_Pennington_0020.jpg by Grzegorz Furmanski, on Flickr

same settings, slight crop
20170203_Pennington_0011.jpg by Grzegorz Furmanski, on Flickr

f7.1, 1/640s/ ISO 2500, haf frame cropped out
20170203_Pennington_0022.jpg by Grzegorz Furmanski, on Flickr

After using this lens for few months the only change to my score is AF. It's accurate and fine for static subjects or slower flying birds, but if you want tracking faster flying birds you're in for some hard time. I just got back from Farne Island in UK, where you have thousands of birds right in front of you, flying and siting within few meters.
Out of about 300 photos I took of Puffins in flight about 15 is in sharp focus. I think it's due to the lens being too slow adjusting focus, it just can't keep up with birds moving. All the right focus points light up in viewfinder and camera is trying to follow but lens just can't keep up.
I still think it's a great lens but you hava to be rally patient if you want to shoot BIF with it.

Couple good ones:
IMGP7223.jpg by Grzegorz Furmanski, on Flickr

IMGP7116.jpg by Grzegorz Furmanski, on Flickr
Veteran Member

Registered: January, 2015
Location: Maryland
Posts: 1,677

10 users found this helpful
Review Date: December 1, 2016 Recommended | Price: $710.00 | Rating: 10 

Pros: Weight, Size, Sharpness, Color Rendering, WR, Smooth Focus
Cons: Very little... AF speed I suppose?
Sharpness: 9    Aberrations: 9    Bokeh: 8    Autofocus: 8    Handling: 10    Value: 10    New or Used: Used    Camera Used: K-3II   

Sharpness: 9/10 - only because I can't put it at the same level as the surgical DFA 100mm WR.
Abberations: 9/10 - It's good, but I've had some CA in certain lighting situations. Inevitable sometimes
Bokeh: 8/10 - It's good at times and unpleasant at other times... Though, I'm not buying a 300mm f4 for superb bokeh characteristics...
Autofocus: 8/10 - I think it's a combination of things. SDM is fairly old tech and Pentax is definitely behind compared to the competition when it comes to AF speed. But it's still great, and it's silent which is critical for wildlife shooting.
Handling: 10/10 - This lens feels incredible, build quality is superb and paired with a K-3II and D-BG5 grip it's very well balanced. Easily handheld.
Value: 10/10 - Let's just say I scored a deal on this lens and I wouldn't ever be able to sell it for what I think it's worth.

Overall: Easily a 10/10 solely for the value. This lens is superb - if you can find a copy for under $1000 grab it.

Before buying the DA*300 I owned the Bigma 50-500 OS.
It was a great lens, but it was big at 500mm. It was difficult to get through the woods with at full extension and I was never super happy with the results past 400mm.
It was also difficult to shoot handheld and at 6.3 wide open, I needed a lot of light!

I was skeptical buying the DA*300 since I was going to lose 200mm.
I must say even with the loss in FOV, this lens make up in superior image quality and color rendering.
At a cropped equivalent, the DA*300 beats the Bigma at 500mm EVERY day, IMHO.

Weather Resistant - Not much to say here. Awesome feature I hope I never need to rely on, but it's there just in case!

I'm yearning now for the HD 1.4x TC to pair with this lens.
For such a small package I can have a 300mm f4 and a 420mm f5.6 in the bag.

Highly recommended.
Probably my favorite Pentax lens to date.

It converted me to primes... Soon after I sold every zoom I own and bought the DA15, DA35 macro, DA70, and DFA100 WR.

That's all the kit I need.

If there was one lens to rule them all, it would be my DA*300... I've shot portraits, wildlife, landscapes, pseudo-macro... It's an all around winner in my bag.


Here's some sample shots.

IMG_3236 by Logan Hall, on Flickr

IMG_4206 by Logan Hall, on Flickr

IMG_4169 by Logan Hall, on Flickr

IMG_2662 by Logan Hall, on Flickr

IMG_2636 by Logan Hall, on Flickr

IMG_2695 by Logan Hall, on Flickr

IMG_2107.jpg by Logan Hall, on Flickr

IMG_2361.jpg by Logan Hall, on Flickr

IMG_4013 by Logan Hall, on Flickr

IMG_1443 by Logan Hall, on Flickr

IMG_4201 by Logan Hall, on Flickr

IMG_5346 by Logan Hall, on Flickr
Senior Member

Registered: August, 2008
Location: Southern New Mexico
Posts: 119

1 user found this helpful
Review Date: July 26, 2016 Recommended | Price: $900.00 | Rating: 10 

Pros: Sharp, Vibrant Colors, Bokeh, balanced on camera/tripod
Cons: none
Sharpness: 10    Aberrations: 10    Bokeh: 10    Autofocus: 8    Handling: 8    Value: 10    New or Used: Used    Camera Used: K-3   

I didn't plan to purchase this lens but then again I didn't plan to purchase all the other lenses I now own. It takes a little getting used to for example, I start at f/5.6 to get enough depth of field to include the whole bird in focus. I also manually focus most of the time since I don't want it hunting for the subject and blow the picture just before I take it. Coming from the "old days" of film and manual everything, I prefer using my brain instead of letting the camera decide everything for me. The lens itself is large, metal and full of glass. If you want a fragile plastic light lens for that quick shot, this isn't for you. If you have the patience to practice and the knowledge to use a lens that will last a lifetime, this may be something to explore.
New Member

Registered: August, 2014
Location: Palm Beach, Fl
Posts: 4
Review Date: April 2, 2016 Recommended | Price: $900.00 | Rating: 9 

Pros: Build Quality, Color rendition
Cons: Could be sharper
Sharpness: 7    Aberrations: 9    Bokeh: 7    Autofocus: 9    Handling: 9    Value: 9    New or Used: New    Camera Used: K3   

I was expecting a little more sharpness from what I read on previous forum posts. The pictures I've taken were with the f-stop wide open at f/4. If I stopped down, I could probably improve the sharpness. Handling and auto focus were excellent. The colors really pop with this lens. For the price it is an excellent value from a Pentax offering. Currently my favorite lens. I highly recommend it.
New Member

Registered: June, 2015
Location: Iasi
Posts: 14
Review Date: March 14, 2016 Recommended | Price: $853.00 | Rating: 7 

Pros: built quality, tripod foot, heavy, very silent
Cons: AF, AF, AF
Sharpness: 6    Aberrations: 8    Bokeh: 8    Autofocus: 3    Handling: 10    Value: 7    New or Used: New    Camera Used: K-3 II   

I added "heavy" to the Pros section because I've always felt like a heavy lens is easier to stabilize when hand held...up to a certain weight of course. For my stature, the weight of this lens is perfect for doing just that.

Built quality is very good, almost on par with $3000 others from more famous brands. The tripod foot is also very well built and fitted in the perfect part of the lens. The hood gives the lens a pro look, and the filter rotating hatch is a great addition.

In regards to optics, and AF in particular, things are not as good. Yet I see some amazing shots taken with this lens, so I'm questioning my shooting and/or focusing technique since I am just an amateur. But I can't help comparing it to the last similar combo I've owned: Canon 7D mk II + Canon 70-300/4.5-5.6 USM. The Pentax setup acts like someone who's trying to focus manually without wearing the prescription glasses in comparison.

AF is very slow in PDAF, but very quiet. I have a Sigma 18-35/1.8 that has similarly slow focus and only works best in CDAF. But the 300 fails in CDAF as well. And things are not getting better by closing down either. When I look at the pictures in DCU5, the focusing points displayed are not in focus, and the focus is not in front or in back either. Everything is just fuzzy for no apparent reason.
Veteran Member

Registered: September, 2013
Location: Sydney
Posts: 844

3 users found this helpful
Review Date: November 28, 2015 Recommended | Rating: 10 

Pros: Build quality, razor sharp, creamy bokeh.
Cons: I'm now yearning for a DA* 200
Sharpness: 10    Aberrations: 10    Bokeh: 10    Autofocus: 9    Handling: 10    Value: 10    New or Used: New    Camera Used: K-3   

Picked this lens up on a Black Friday whim. I've been put shooting with it all day, and holy cow! I'm used to some good glass (I own all the limiteds, 50-135, 8-16, and a bunch of decent primes), but the DA* 300 really is a step up from those. The first thing I noticed when opening up the box (aside from the Ricoh branding on the box, which I've now seen on a lens before), was how cold the lens was (I'm used to the feel of the DA 50-135, and so the metal barrel took me by surprise). Next to this lens, the 50-135 feels like a cheap plastic toy!

The next thing you notice, is the size and weight. It's big, bigger even than my 67 and 645 lenses! That comes with the territory I guess

Image quality wise? Superb! It's easily up there with the 31/77 (and dare I say it, possibly better?). I was a bit surprised at how quick the autofocus was (the only other sdm lens I have is the 50-135, and that's very slow in comparison). The only minor quibble is the F4 aperture. On a dim, overcast winter day, I found myself needing use a higher ISO than I'm accustomed to, but I'll forgive it that, because the sharpness is astonishing!

A great lens, and possibly the best lens Pentax makes!
Forum Member

Registered: June, 2014
Posts: 62

1 user found this helpful
Review Date: November 20, 2015 Recommended | Price: $969.00 | Rating: 10 

Pros: Sharp, color rendition. overall IQ, AF fast & furious
Cons: 1st lens AF FAIL out of box. Replacement took 6 Mos.
Sharpness: 10    Aberrations: 9    Bokeh: 10    Autofocus: 10    Handling: 9    Value: 9    New or Used: New    Camera Used: K3/K30/K3ii   

I am really disappointed in this lens. The AF was faulty out of the box. It worked fairly well at first but it didnít take but about 20 shots when it failed to AF reliably. It only got worse from there. I tried to record a rare eclipse of the moon. AF failed function again. I did a sesion with a K30 to be sure it was the lens. The lens is now in warranty service and awaiting parts. If any member has had the same problem pm me please.I have been satisfied with PENTAX products since 1981.I hope to
add a happy ending when I get it back.
After 2 trips to Precision Camera for repair,extended parts delays, Ricoh Decided to replace the lens.
Now for the good part, I am extremely happy with the replacement lens. After two sessions I had nothing but great results. IQ is superb.AF works like a charm. This new
lens fits the bill of all the other great reviews.
New Member

Registered: February, 2013
Posts: 2

1 user found this helpful
Review Date: May 5, 2015 Recommended | Price: $1,200.00 | Rating: 9 

Sharpness: 9    Aberrations: 9    Bokeh: 9    Autofocus: 9    Handling: 10    Value: 10    New or Used: New    Camera Used: K 30   

New Member

Registered: April, 2015
Posts: 10

1 user found this helpful
Review Date: April 8, 2015 Recommended | Price: $1,300.00 | Rating: 9 

Pros: Image quality, contrast, smooth and silent AF and bokeh
Cons: Auto focus hunts from time to time
Sharpness: 9    Aberrations: 10    Bokeh: 9    Autofocus: 7    Handling: 10    Value: 9    New or Used: New    Camera Used: K-3   

This lens seems to be a very good investment, it has a superb image quality and contrast. The handling is perfect for such a big lens it is perfectly usable hand held and you get sharp results. The only negative point is the autofocus that sometimes hunts for a while, but usually in difficult situations only, its far from being a deal breaker. I just used this lens today for an hour, therefore I will probably update this review. In any case I would say that this is a "must have" lens for anyone interested in wildlife photography.

So now I have been using the lens for a while longer, and had the opportunity of testing it in more "Wild" situations and not city birds that are mostly still. The only thing I will change from my first comments is regarding the autofocus capabilities. It doesn't seem to be in pair with the other extremely good capabilities of the lens, I have missed a few shots due to slow focusing. However I am not aware on how other lens from the same price range do relatively to this one, therefore my evaluation is just regarding how satisfied I am with it and not a comparative evaluation. I will leave so sample pictures, when you get it you get it for real. Very nice performer overall! Buy it!

Be aware that this are compressed and/or cropped jpeg. You can expect much higher image quality of course.

Registered: February, 2015
Posts: 12,078

2 users found this helpful
Review Date: April 6, 2015 Recommended | Price: $1,000.00 | Rating: 9 

Pros: Color rendering, sharpness
Cons: Sensitive AF does not lock 100% when used with HD x1.4 TC
Sharpness: 10    Aberrations: 10    Bokeh: 10    Autofocus: 7    Handling: 10    Value: 9    New or Used: New    Camera Used: K-5, K-3   

Used for wildlife photography, this lens deliver really excellent images.The image quality is good right from wide open. At 300mm on APS-C (420mm) is already not so easy to use, and with HD x1.4 TC (630), but the in camera SR still works, but in this case, a tripod is really the best !! And this lens is not very heavy so it allow a good mobility for photographing sport events. For sports, a f2.8 would be better (but also heavier).

- relatively small and light weight for a 300mm
- build quality
- great image quality
- bokeh
- effective hood
- silent AF (important for wildlife)
- quickshift

- f4 for use in sports
- AF locking is more touchy than other screw drive lenses, may not lock when using x1.4 TC
New Member

Registered: July, 2014
Posts: 6

2 users found this helpful
Review Date: March 29, 2015 Recommended | Rating: 10 

Sharpness: 10    Aberrations: 10    Bokeh: 9    Autofocus: 10    Handling: 9    Value: 9    New or Used: New    Camera Used: Pentax k3   

After a few months of waiting, finally my Pentax SMC DA * 300mm f / 4 ED [IF] SDM arrived, completing the set that I will use for birdwatching: k-3, battery grip and this lens. It's a totally sealed kit, able to face rain, wind and dust with confidence. Last year, in the Amazon rainforest, had problems with a Canon 70D, which led me to migrate to Pentax.
I did not have many opportunities to get out into the field to test the lens yet, but the three chances I had, the Pentax 300mm showed why he is one of the most acclaimed telephoto brand. I have know how to do a review, but I will spend here the first impressions I had the lens.


Design strength. It is a lens first line, with perfect finish. Very little or no metal and plastic. Pass the feeling of strength and confidence so that puts his hand on it.
Silent and fast. Aside from the noise of the autofocus in, you do not hear anything else. The engine is extremely quiet and fast, which is an advantage to practice birdwatching.
Sharp: The sharpness is impressive. Even in low light the result is very good. The focus is necessary, as all the equipment Pentax
Image quality: I give the note 10 to the lens
Chromatic aberration: Another item to note 10
Bokeh: I have a Canon 300mm f / 4, I use with a 6D. I love this set, but the bokeh Pentax 300mm f / 4 is more softer, less aggressive, more beautiful.


Price: It is a lens face, especially with the surge of the dollar, but worth every penny. In BH costs just over $ 1,000.
Weight: 1040 kg weighs just over 70 grams above the Canon 300mm f / 4. It could be a little lighter, especially for those who use it to passarinhar. The solution I found was to use a shoulder black rapid strap, which distributes the weight and leave the comfortable equipment in the body.
Tripod collar: It is removable and comes a little conflicted when using the grip.
Forum Member

Registered: August, 2010
Location: Edinburgh
Posts: 91

4 users found this helpful
Review Date: February 9, 2015 Recommended | Price: $1,065.00 | Rating: 10 

Pros: reach, image quality, build quality
Cons: size, weight, lens hood
Sharpness: 10    Aberrations: 10    Bokeh: 10    Autofocus: 8    Handling: 8    Value: 9    New or Used: New    Camera Used: k-3   

Image Quality:
This lens is heavy, big, and expensive Ė it had better be really good image quality.

And it is. Sharp, colourful, so much detail which you appreciate even more when you start to pull apart the raw and do post-processing - it really holds up. Aberrations of all sorts are excellently controlled.

Quite certainly the best image quality from any Pentax lens I have used. I also use the D-FA f2.8 100mm macro, and the 300mm (just) beats it for sharpness and easily beats it for the way it controls chromatic aberration (CA lets the 100mm macro down in my opinion).

At f4 it already looks good, which is vital as the long focal length means you want 1/100 (with stabilisation reduction) or higher shutter speed. The fact it doesnít go to f2.8 is a shame, but an acceptable compromise Ė it would be much heavier and more expensive. On a modern camera the ability to push ISO up means f4 is ok.

Silent SDM.Quite fast though not blistering, compared to the 55-300 it seems faster. On k-3 it is accurate, and though it can be a chore to track a moving target the lens itself is performing at a good level considering the long throw. I dislike the lack of hard stop at infinity focus and minimum focus.

Extremely solid feel. It is heavy, but itís a big bit of glass and metal so thatís expected. It doesnít feel heavier than you expect from the size. The weight is distributed quite evenly so I could hand-hold it on my k-3 for short durations (though rarely would need to).

I really dislike the lens hood. I have about 20 Pentax lenses from the K, M, A, DA and D-FA ranges and this is the worst hood I have used. I donít think my copy is defective, I just think itís badly designed. I find it difficult to line up the dot on the lens with the hood, and often have to try several times to get it to click into position, even with running it gently around waiting for the click. Even then, it doesnít click satisfyingly, it sort of slips into position as it is rubberised so I am never quite sure if itís secure. Reverse mounting is even worse as I canít see the dot.

I would estimate that I have attached and detached the hoods 100 times now, and I still find it difficult. I do not force it but even so I have noticed it visibly wearing and tiny rubber fragments coming off.

Another minor complaint is the huge focus ring, gives me less area to rest my hand and more likelihood of knocking focus out of position accidentally.

I upgraded from the DA 55-300 f4-5.8. At 300mm the DA* 300mm is sharper edge to centre, more contrasty, has better bokeh and colours and can be used from f4 with good results (f5.8 on the 55-300 is significantly worse than a stop or two down.) Plus, the 55-300 is only really a good performer up to about 250mm.

Subjectively, I feel more able to get reach and detail in an entirely different class from the 55-300.

Do you need this lens?
If youíre shooting wildlife it will unlock shots you simply canít take otherwise.

f5, ISO 250, 1/200 s Ė Robin. I am blown away by the colour and detail. Iíve never seen the spines down a robinís throat before now.
f5, ISO 640, 1/250 s Ė Robin. At about the minimum focus distance. Eye-popping intricacy in the feathers. The background was cluttered brown leaf litter, but this is nicely resolved by the DA* 300mm.
f5, ISO 200, 1/400 Ė Grey Squirrel. Lovely smooth background. Great detail in focus plane.
f6.3, ISO 500, 1/125s Ė Landscape. Nice background compression from the focal length, but the shot was able to take a lot of post processing to colour and contrast without starting to look odd.
Inactive Account

Registered: December, 2013
Location: United Kingdom
Posts: 7

3 users found this helpful
Review Date: January 15, 2015 Recommended | Rating: 9 

Pros: Sharpness, ability to crop and still retain sharpness
Cons: Autofocus can hunt a little in low light.
Sharpness: 10    Aberrations: 9    Bokeh: 9    Autofocus: 8    Handling: 9    Value: 9    New or Used: Used    Camera Used: K-3   

I have just purchased this lens from ebay and it is in excellent condition.
just took it out this morning and had a little play with my K-3 to see how sharp it was and test the autofocus.
This is the best Pentax lens I have used so far and I would go as so far to say that on first impressions it's as good as the Nikon 70-200 f2.8 for sharpness.
I will use this to do large panos and stitch with autopano pro to get better detail and will test it gigapan to see how it works too.
Not going to use it much for sporting or action but will expect it to manage OK.
Truely inpressed with this lens and picking up such a nice copy in the condition I did for £550 is my bargin lens to go with my Samyang 14mm f2,8 for my astro shooting.

Picture of my prize Rooster called Rocky.
Add Review of SMC Pentax-DA* 300mm F4 ED [IF] SDM Buy the SMC Pentax-DA* 300mm F4 ED [IF] SDM

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