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Forum: Troubleshooting and Beginner Help 06-01-2019, 02:54 AM  
Advice for new KP user: lenses
Posted By MrB1
Replies: 41
Views: 2,666
The IQ of any lens, even the highly respected Pentax Limited lenses, decreases when viewing out from the centre to the edge of the image circle. The IQ also tends to decrease towards the extremes of aperture and zoom range. Whether the deficiencies of a lens have any impact on the image depends on lots of factors, not least how they are viewed - print/screen/size/distance. I view normally on a 21 inch screen and/or print up to A3 (16 inches).

For my copy of the 18-135, my views generalise according to the circular regions in the sketch below. In the central circle the image quality is always very good - close to prime lens quality. A slight softness begins to appear in the next circle, becoming more noticeable beyond about 70 mm focal length. There is always some visible softness and vignetting in the corner regions. For many subjects (and lenses), the corner performance is of little or no consequence, as the subject is usually framed within that central circle.

For the 18-135, as the general purpose, highly versatile lens that it is intended to be, stopping down by one stop or more can produce very good quality images - and the KP will be fine with stopping down because it has such excellent higher ISO performance. It is just probably not the lens for photographing brick walls at 18 or 135 mm.

Philip
Forum: Troubleshooting and Beginner Help 05-31-2019, 04:46 PM  
Advice for new KP user: lenses
Posted By RGlasel
Replies: 41
Views: 2,666
Please don't lose sleep over the IQ of the 18-135. A holiday in Europe, I guarantee two things, one, you will be pressed for time to do everything you want to and two, there will be lots of people wherever you go. You will ruin your holiday if you continually stop to get that perfect shot, the 18-135 will give you quick, accurate auto-focus with such a wide range of focal lengths, you can spend the whole day taking pictures as you go. I have the DA 15 and 55-300 as well as the 18-135: most of the time the DA 15 comes out for shots of wide open spaces and big skies (which you won't see on your holiday) and the 55-300 comes out for wildlife (which you also won't see on your holiday). The DA 15 would be a great second lens to bring for when you get the chance to stake out vantage points (as in the samples Sandy Hancock posted), but it is more expensive than the 18-135 and it only works in special situations. Walking among people, 18mm is as wide as you want without inadvertently capturing the people on your immediate left and right and 135mm is useful for getting pictures of statutes, windows and street performers when there are fifty people between you and what you want to photograph. 21mm is great for getting the sides of buildings on both sides of the street as you are walking and the 18-135 is excellent at that focal length.
Forum: Troubleshooting and Beginner Help 05-31-2019, 03:51 PM  
Advice for new KP user: lenses
Posted By officiousbystander
Replies: 41
Views: 2,666
I did a Europe trip in 2014 with two kids (then 5 & 8) with the a K5 and DA15, 35 and 70. I would decide what lens I'd put on depending on where we were going and just live with the decision for the day. I also think doing this helps you improve as a photographer. And if I really wanted to change a lens, time out in a café would work well.
Forum: Pentax KP 05-31-2019, 01:33 AM  
DA14/2.8 on a KP?
Posted By BruceBanner
Replies: 19
Views: 1,950
No not yet but it's on the to do list. I'll update this thread when I have something to show in that regard. Thanks for the kind words!

Regards,

BB
Forum: Troubleshooting and Beginner Help 05-30-2019, 03:41 AM  
Advice for new KP user: lenses
Posted By robgski
Replies: 41
Views: 2,666
Please consider the images in this thread, it might assuage your fears about the IQ of the DA 18-135mm
Forum: Repairs and Warranty Service 12-13-2018, 02:49 PM  
k-30 moving sensor --stabilsation problem?
Posted By Cee Cee
Replies: 1
Views: 476
trouble I fear, It seems like a problem with control electronics or drive servo. It's looks like it's hunting ie. can't find it's resting or neutral position, could be as simple as a detached wire or as complex as a faulty microcontroller, perhaps someone here has had a similar problem or similar symptoms and may be able to offer advice but the same symptoms doesn't necessarily mean the same fault or repair procedure. Unfortunately I think you will have to spend some money to find out.
Forum: Troubleshooting and Beginner Help 05-26-2019, 03:31 AM  
Advice for new KP user: lenses
Posted By MrB1
Replies: 41
Views: 2,666
To fulfil that brief it is doubtful that there would be anything else that could compare with the DA 18-135.

e.g. used-pentax-da-18-135mm
Forum: Troubleshooting and Beginner Help 05-26-2019, 02:30 AM  
Advice for new KP user: lenses
Posted By robgski
Replies: 41
Views: 2,666
FWIW, a PF member is offering an M42 mount 17mm FE lens for an incredibly low price. I own one, and on APS-C, it is a very wide-angle lens with minimal FE . This lens was the second prime I purchased, and it stays on my camera for weeks at a time.
Forum: Troubleshooting and Beginner Help 05-26-2019, 12:48 AM  
Advice for new KP user: lenses
Posted By grispie
Replies: 41
Views: 2,666
I understand you are looking for an improvement over the 18 55 wr but with a budget constraint.
Personally i can appreciate the 18 55 wr. You can take good solid shots with it. This said: in good light at optimal settings...

When looking at replacing the 18 55 (thus a walk about) i'd be looking at two options, both economical 2nd hand:
pentax da16 45 or da 17 70. I owned both. The 17 70 being more versatile because of the longer reach.
IQ wise, they are both very fine lenses, a true step beyond the 18 55. Do not expect really compact or fast AF..

If you're interested, you can find shots with da16 45 in my US gallery (smugmug below..) and some samples 17 70 in mexico and france gallery.

As others mentioned, there are a lot of options. Maybe tamron 17 50 2.8 is one of them.

Also mentioned by others: da 15. I also have it and really like it. Especially would be very nice in european cities. Da21 for a bit more conventional focal length. I do have the feeling you are looking more for a quality standard zoom in addition to your two primes.

16 85 would seem the best for you, but not sure whether this is within your budget. I don't own that lens, since i really like my da 17 70...

comes down to this i guess:


best of luck
Forum: Troubleshooting and Beginner Help 05-25-2019, 03:18 PM  
Advice for new KP user: lenses
Posted By Biro
Replies: 41
Views: 2,666
I have the DA 20-40mm Limited and enjoy it very much. I think it's a must for the KP. But if the OP is going to spend much time in inner cities on his vacation, I don't think 20mm (30mm full-frame equivalent) will be nearly wide enough. So I'm with those who think the the DA 15mm Limited is a better choice.

Another lens that hasn't been mentioned is the Tamron 10-24mm, which is still available in K mount. But maybe the best deal of all is the Sigma 10-20mm, which has an f/3.5 constant aperture and costs even less than the Tamron. At B&H here in the U.S., it's available for $399 brand new.
Forum: Troubleshooting and Beginner Help 05-25-2019, 11:15 AM  
Advice for new KP user: lenses
Posted By mikesbike
Replies: 41
Views: 2,666
For a great all around fast pro-style lens, can't beat the Sigma 17-50mm f/2.8 constant aperture lens. Fine build quality, and fast, quiet, accurate AF. Exceptionally low field curvature, even among the best of such lenses. Its imaging is excellent and the f/2.8 is good for low light. However, it is not especially compact, and does not have WR.

The DA 20-40mm f/2.8-4 Limited is a great compact all around lens. Very sharp results. Extremely fine build quality with WR, great imaging, but does have some field curvature that can occasionally show differences in focus in certain instances. Its very compact design is ideal on the KP.

The DA 18-135mm is a wonderful lens. Very versatile and very compact for having such a zoom range. Very well built with WR. Exceptionally fast, accurate, quiet AF. Far better than the older 18-55mm kit lens. Its central-area sharpness is exceptional throughout, and when used between 18-50mm, a good range for landscape use, very good performance even edge to edge. Even up to 70mm for this. Just stop it down a click or so to f/5.6 for better results to get the best edge performance through this range. Its compactness makes it a good combo with the KP.

I have all three of these lenses, and use all of them, which one depending on the situation.

You can always shoot JPEG + RAW to see how your own processing compares with the camera's. The KP's processor is exceptionally good for right out of the camera JPEGs. Don't use the green auto mode unless handing the camera to someone else not acquainted with DSLR use. Shoot in "P" mode if wanting fully automated exposure by the camera, as in this mode you have access to all controls and adjustments. Be sure to set "Fine Sharpening" in the Custom Image menus for superior fine detail in your images, at least in the "Bright" category, which is best for most shooting needs.
Forum: Troubleshooting and Beginner Help 05-25-2019, 10:23 AM  
Advice for new KP user: lenses
Posted By robgski
Replies: 41
Views: 2,666
As always, 2 considerations for combining travel and photography are "What kind of traveler am I?" and "What is my preferred of photographic style?" Some people want to see 12 countries in 10 days, and are always on the move, for them, I recommend a good zoom. Others are happy to walk around a few places in one city, maybe revisit the same places at different times of day, and are able to stop, sit, change lenses, wait for the light to be just right, etc. For them, they might want a few primes, they'd rather get one perfect shot and are willing to do what it takes to get that shot.

If you want a durable, lightweight "walk-around" lens with great IQ at an affordable price, the DA 18-135 WR is the best choice.
I travel often, and I prioritize gear that is Lightweight, compact, durable, and reliable. I I have travelled for up to 6 months at a time with only that lens, and a DA 40mm XS prime, and I seldom wished I had anything other lenses with me.

IMO, on APS-C, if you have a lens that closely matches the FOV of the human eye, (including peripheral vision), and are willing to take the time to compose the shot, you will be pleased with your images. For myself, I prefer to take pictures that show why I found a place interesting or breathtaking, not just a shot that shows I stood in the same spot as everyone else does when they capture a well-known landmark I look forward to seeing your pictures.
Forum: Troubleshooting and Beginner Help 05-28-2019, 05:29 AM  
Advice for new KP user: lenses
Posted By TER-OR
Replies: 41
Views: 2,666
You've received plenty of advice, so I'll just add my experience.
When traveling I always have the 18-135. Its versatility and weather resistance make it worth always having. The 16-85 is generally regarded as a step up, but the reach is nice at 135mm. Swapping lenses can be inconvenient, and the 18-135 is pretty compact.

The other two I always bring are the DA21 and DA40. The 40 is a bit tight indoors, but the 21 is a great "eye-view" lens. It's super-sharp and has amazing contrast. It's the only lens my Canon or Nikon friends are really jealous of. It's just plain fun. It does well at close portraits and candid photography, it doesn't make people nervous like some big zooms can.
Forum: Troubleshooting and Beginner Help 05-26-2019, 11:33 AM  
Advice for new KP user: lenses
Posted By mikesbike
Replies: 41
Views: 2,666
The other thing to address with using primes when touring is- if alone and at leisure, this can work well. But if with a group or a guided tour, time for lens changing might be cramped. One could be so busy with the equipment it would cut into the enjoyment of seeing the sights. This is where a zoom lens makes more sense. My common practice is having a zoom lens on the camera and the DA 15mm in the front accessory pocket of my camera holster case. It is that small, and there if I need it and have time to switch.
Forum: Pentax KP 05-28-2019, 01:41 PM  
K-30 to KP
Posted By BryantCP
Replies: 37
Views: 2,876
I added a KP at Christmas to my collection of Pentax cameras. As someone that regards the K-7,K-5, K-3 cameras as having ergonomics as near to perfect as possible, I found the KP surprisingly easy to get used to. I generally use the medium grip which makes the camera a little harder to hang on to then say my K-5 or K-3, though the large grip does help in that regard. Though I suspect people with large hands might find the KP uncomfortable to use. Unless that is the case you should adapt to the KP's differences after a week or two of use. I enjoy mine more than I thought I would.
Forum: Pentax KP 05-27-2019, 06:14 PM  
K-30 to KP
Posted By mikesbike
Replies: 37
Views: 2,876
My impression is faster, more accurate AF with many of my lenses. For whatever reason, the DA 18-135mm lens I have found to deliver excellent AF in terms of being fast, quiet, and accurate regardless of the camera body- even on my older original K-5, which doesn't have the best reputation for AF, especially in artificial lighting, but with that lens performance is unaffected!

The KP, however, has been great for AF, even with those lenses having the old screw-driven system.

I have the same rear screen design as the K-70 with my K-S2. It can occasionally be very useful, and notably has the ability to completely reverse to take a selfie, even having a separate shutter release button for this purpose. With a wide angle lens, this can also be a 2-person selfie. The tilting rear screen of the KP has its own advantages, in that it does not add physical width when in use.

The use of the optional battery grip does of course add bulk and weight- a similar weight as the K-3 II without a battery grip. To use or not to use one is a very individual matter, so the good thing is its availability. The choice is there. In extreme circumstances, such as extensive sports or other ongoing action scenarios, where one would not want to be interrupted by a battery change, the KP with the added battery grip would actually be capable of providing longer battery life than the K-3 II without a battery grip, and at about the same carrying weight.

Some find having the battery grip installed more comfortable for just handling the camera with a large lens attached when not shooting. Others are still fine without. As for me, I can adjust easily either way, and can do just fine with only the smallest included grip regardless of the lens size. But ideally for me, I find the smallest included grip great for very compact to mid-compact lenses, while with semi-large lenses like a kit setup such as combining the Sigma 17-50mm f/2.8 EX DC and the Pentax DA*50-135mm f/2.8 SDM, in which case the largest included grip is ideal. Then for a larger lens yet, such as my FA* 300mm f/4.5 or larger, the battery grip comes out best. And I mean for handling when not shooting, or when shooting extensively in the vertical position. With proper holding in the normal shooting position, as I said, for me it does not really matter.
Forum: Pentax KP 05-23-2019, 06:28 AM  
K-30 to KP
Posted By gatorguy
Replies: 37
Views: 2,876
I've only used the articulating screen on the K70 a handful of times, rarely needed it outside of some macro stuff close to the ground but certainly appreciated having it. I haven't used the KP for that at all yet.

As for lenses I have them all listed in my signature, but the primaries have been the Sigma 17-50, DFA100WR, DA*50-135, DA*55, DA*200 and FA77. The rest are simply supporting cast. I do go thru stages where I'll carry the *300 on nature hikes for awhile but in general prefer the lighter and smaller 200.
Forum: Pentax KP 05-27-2019, 05:14 AM  
KP and 16-85
Posted By tljensen
Replies: 23
Views: 4,339
Its a perfect match! My 16-85 is exceptionally sharp and handles well. It was the first lens I bought after I received my KP and have no regrets. Its on my camera 90% of the time.
Forum: Troubleshooting and Beginner Help 05-25-2019, 05:34 AM  
Advice for new KP user: lenses
Posted By Sandy Hancock
Replies: 41
Views: 2,666
The three lenses you have are a fine start. The two primes especially are capable of excellent image quality, and your WR kit zoom might have its uses, even in a European summer. Try to learn its strengths and weaknesses more thoroughly and you'll get more out of it.

If you're spending a fair bit of time in cities, you might be better served looking at a wider option. I have found the DA 15/4.0 Limited extremely useful in narrow streets and inside cathedrals. You should be able to find a second hand copy at a decent price.











Another option is the DA10-17 fisheye zoom. At the "long" end it de-fishes to match the angle of view of the DA15, and at the wiiiiiide end it can produce some dramatic images.





Forum: Lens Clubs 05-25-2019, 04:28 PM  
DA Limited Zoom Club
Posted By TerryL
Replies: 861
Views: 186,760
I disagree, entirely. It's a wonderful lens to use on whatever is important to you. You won't regret buying it. Prices are lower than they've been in the past.
Forum: Lens Clubs 05-25-2019, 03:40 PM  
DA Limited Zoom Club
Posted By BruceBanner
Replies: 861
Views: 186,760
Respectfully disagree. The 18-55 kit lens is definitely not in the same league as the 20-40 and I doubt the fella wants to only snap kids on holidays, I think he'll want to do some nice landscape work. I don't understand why you might struggle to see the 20-40 as being a capable walkaround lens :confused: 20-40 on crop is equivalent of 30-60 on FF, which covers a lot of uses. The GRII/III has a 28mm FF equivalent FoV which is close enough to the 20-40 being at 20mm on a KP, so essentially at it's widest it is conforming to a focal length that is has already been deemed extremely versatile. Think of all the kinda shots that a GRII/III can pull off at it's fixed 28mm, plenty of portrait shots, plenty street shots, plenty of landscape shots. And here we haven't even begun to explore the other focal ranges of the 20-40, pushing up to 40mm and f5.6 (for ultimate sharpness) with close range head shots will resolve background bokeh excellently for portraits.

The question being asked is if the AF system will struggle for candid kid shots I think, and my answer to this is probably no more than any other Pentax lens on offering with perhaps the exception of the new DFA50/1.4 which is said to actually perform significantly better in all AF tests related (quickness, accuracy etc).

The 20-40 with a prime for portraits would be an excellent holiday package, especially if you can choose that prime wisely, something that is either small like a FA43, DA70 or even just a cheap Tak 135 for longer reach. But make no mistake the 20-40 can still 'do it all', really it comes down to spending enough time with that lens, getting the most out of the focal lengths and aperture choices at those focal lengths. Any lens can be a portrait lens if you learn it.

My point is you will overcome any AF sluggishness for candid shots if you exploit the inner menu settings more. For example, a kid running along a beach, you might want to have a User Mode set up with;
  • Av Mode

  • High Cont. Burst

  • Jpg Only

  • -0.7 EV (protect highlights)

  • AF.C

  • Back Button Focus

  • 'Change AF Point Button - 2'

  • AF Active Area SEL

  • 1st Frame Action in AF.C - Focus Priority

  • Action in AF.C Cont. - Focus Priority

  • Hold AF Status OFF

  • Contrast Detection Face Detection

  • Contrast AF Options Focus Priority


You'll want to spam plenty, fill that buffer up which is why you want Jpg and not RAW for this. Face Detection would be used for those quicker 'stationary' candid moments, such as kid sitting on teh wall eating Ice Cream (if proficient with this mode it can almost be used like a GRII/III and not even let the kid know shots are being taken.

Like most things success of shots is down to understanding the gear well, practising, experimenting with settings, arguably this will make up for any 'sluggish' AF performance that sits 0.3secs behind another lens for AF lock.
Forum: Lens Clubs 05-25-2019, 10:59 AM  
DA Limited Zoom Club
Posted By nocturnal
Replies: 861
Views: 186,760
Strange and baffling to me hearing folk calling this lens a 'walkabout' lens or a holiday lens etc... I have it as my most used landscape lens as it has stellar IQ... Look at the images a few pages back.

Kids on holiday? Just buy a used 18-55mm kit lens or something similar, the 20-40 Limited is an expensive over-
kill for your needs and might not meet the Sony Canikon AF requirements you might require I.e. The equipment does all the work for you with eyeball tracking 400 AF points etc. etc.
Forum: Lens Clubs 05-25-2019, 12:42 AM  
DA Limited Zoom Club
Posted By BruceBanner
Replies: 861
Views: 186,760
I haven't really put my 20-40 through the 'moving kids' thing yet, my feeling is you will want to have your camera set up pretty well for it tho (Focus Priority, Hold Off etc). If you have a fast screw drive I would possibly take that as well, just in case, but really I think you'll be fine. It all depends on the kids and how old they are, will they stay still, or are they runners. I have used this lens on the KP and K-1 and I think both those systems drive the AF possibly better than older models. I heard the AF was slow but really I haven't noticed a huge difference, not enough to deter me. I mean... if you want to capture action shots of kids there are more important settings you want to get sorted that will account for a far larger success rate of shots vs 0.3sec slower AF lens etc. Not enough about these settings are really explored imo.

I think something like the DA70 would make a nice compliment to the 20-40, it's small, faster aperture and delivers great results.

Distortion I think is easily fixed, for portrait kid stuff I wouldn't worry at all about it, there's a lot of distortion with the FA ltds but for portrait stuff it looks worse to correct it, live with it, contributes to that pixie dust :)
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