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Forum: Pentax K-3 1 Day Ago  
Anyone planning to grow old with their K3?
Posted By audiobomber
Replies: 75
Views: 2,564
Sixty is the new forty! i''m 65. When I think back to how my grandparents looked and acted, this new cliche makes sense. They were already old at 50.
Forum: Pentax DSLR Discussion 3 Days Ago  
best settings for K-3 and birding
Posted By audiobomber
Replies: 21
Views: 971
Which raw software are you using? NR is not read in Lightroom or DXO Optic 11, which are the two convertors I use. NR was read when I was using Silkypix, but not applied to the raw file. NR is only applied to the displayed image and incorporated in the final jpeg.

9) High ISO Noise Reduction

Unlike long exposure noise reduction, this setting does nothing for RAW photos. Whether you set it or not, the RAW photo will be exactly the same. (Again, like Picture Control settings, the photo on the back of your camera screen will look different. Still, that is just a preview of your final photo, not the RAW data itself.)

Which Camera Settings Affect RAW Photos?

Back-button AF works the same as shutter half-press. You would hold the AF button down to start focussing, press the shutter release immediately when the active point is focussed on your subject, keep the back button depressed throughout the burst.

Half-press is more comfortable and intuitive for me than back-button focus.
Forum: Pentax DSLR Discussion 3 Days Ago  
best settings for K-3 and birding
Posted By audiobomber
Replies: 21
Views: 971
I linked the Ricoh K-3 website where they explain all of the sophisticated tracking features built into the K-3. If you don't want to take advantage, that's your prerogative, but you are nullifying the camera's ability to assist with tracking.



Hi Paco. What I said is correct, but could use some explanation. Camera jpeg settings do not affect raw files. When you open a raw file in Lightroom or DXO Optics for example, the program provides its own interpretation of how the file should look, or you can choose a preset mode. None of the camera's jpeg settings are used, except for white balance.

I expect you are using the Silkypix software supplied with Pentax cameras? This software does apply the camera settings to display the raw file but they are not "baked into" the file. You can change any of the setting before you export the file, with no effect on the raw file. The only effect is that the program will use the final settings to create the exported jpeg or tiff.

Regardless of this finer point, the question was whether changing jpeg settings for saturation, sharpness, contrast and hue affect write speed to the memory card. Changing these settings will not affect performance.



That's why I added this warning: "make sure focus is on the target before shooting, or you'll have a string of misses".

In AF-C mode, continuous burst, Expanded Area select point, shutter half-press, the camera will look for focus using the selected point first. If you trip the shutter while it is locked on this point, tracking will begin. If you do not take the shot when the camera has found focus on the initial point, the camera's programming will assume that that was not your intended target, and begin illuminating points around the initial focus point. Whatever it is locked on when you take the first shot will be tracked. That's why you must ensure that focus is on the target and not on the background for the first shot of your burst.
Forum: Pentax DSLR Discussion 4 Days Ago  
best settings for K-3 and birding
Posted By audiobomber
Replies: 21
Views: 971
There's quite a bit of discussion of jpeg settings in this thread. IME, high ISO NR and Image Tone (Bright, Landscape, sharpness, contrast, etc) have no effect on the camera's responsiveness. "Lens Correction" however, slows the camera down and should be off for action shots.

Shake Reduction needs to spool up before the shutter is released, otherwise the sensor is in motion and will blur the shot. The K-3 has programming to shut off SR when panning is detected, then restarts when panning stops. Again, if it is cycling while you shoot, you will have motion blur. Pentax clearly intends SR to be off for panning, and action shooting requires high shutter speeds to freeze motion. SR can hurt and is not needed with a high shutter speed, so should be off for birds in flight. (You may want to use it for panning shots like racing, or sports, where a lower shutter speed is used to deliberately show motion blur.) I do not use Horizon Leveling for action shots, for the same reason as SR. I don't want the camera moving the sensor while I am taking a shot. Of course the blur filter should be off for sharpness and speed. There's no reason, nor time, for these sensor features during action shooting.


Confining AF to a single point in AF-C mode prevents the camera from tracking the subject, and a bird in flight moves too quickly to keep a single point directly on its head. Expanded Area must be used to enable the camera's tracking algorithms and Real Time Scene Analysis. With Expanded Area AF, you only need to ensure that the first shot is spot on your intended target, and the camera will step in to ensure that point remains the target, even when it wanders from the center.

Select-area expansion*
Choose one of 27 AF points to focus on the subject, and the K-3 automatically tracks the subject and refocuses on it with the help of the neighboring points, even when it moves away from the initial point

Auto tracking** to trace the subject’s movement in tandem with the new scene analysis system
The PENTAX Real-time Scene Analysis System accurately detects the color, shape and movement of a subject, and keeps monitoring it throughout the imaging process. With the help of this innovative system, the K-3 automatically shifts the AF point to trace the subject’s movement with great speed and precision. Thanks to a wide AF area covered by 27 AF points, it maintains the sharp focus on the subject, even when it’s moving at high speed or when you are using the high-speed continuous shooting mode.

Feature 2?K-3 | RICOH IMAGING



IMO spot metering is best confined to AF-S mode, and used with AE-Lock. Shooting a white bird with spot metering will underexpose, a black bird will overexpose. I suggest Matrix metering and +0.5EV as a default, but may require brightness adjustment in post-processing. I was formerly using Center-Weighted metering, but someone suggested to use Matrix metering to fully enable the camera's 86K RGB sensor and Real Time Scene Analysis for predictive tracking. I believe that advice has merit. (Thanks rawr :))

86,000-pixel RGB light-metering sensor for extra-accurate detection of the subject’s shape and color
An image captured by the K-3’s RGB light-metering sensor with approximately 86,000 pixels resembles a Live View image. Unlike conventional metering sensors which measure the subject’s light level only, it even measures the subject’s primary color and its motion with great precision, then feeds the obtained data instantly to the PENTAX Real-time Scene Analysis System.
Feature 1?K-3 | RICOH IMAGING


I only use Focus Priority for BIF. In sports shooting, a slightly misfocussed shot of a critical goal etc, would be better than nothing, but I delete out-of focus bird shots. I'll probably get a dozen or so in-focus shots as it flies by. Also, I want to ensure that my target is being tracked. If my first shot is on the background clouds or trees, and I am using AF Hold, the camera will track the background instead of the target.

Sorry C_Jones, I am not trying to pick on you or your choices. I just wanted to present my reasoning so people would understand why I choose these settings. I have shot thousands of BIF images. I've spent hours in practice, throwing bread to gulls and ducks and shooting them as they fly around me. I've researched settings to use on the net and tried them in the field. You will not hear me complaining about K-3 tracking, these settings work acceptably well for me. Of course having a lens that can focus with speed and precision like my DA*300 and HD DA 55-300mm PLM helps. Results were less satisfactory with previous versions of the 55-300mm. Then again, how many images of a bird in flight does one need? I usually only keep one or two from each sequence. :cool: I would like to see an improvement in initial focus acquisition speed for the next flagship body.
Forum: Pentax DSLR Discussion 5 Days Ago  
best settings for K-3 and birding
Posted By audiobomber
Replies: 21
Views: 971
i should have mentioned, I only use Center Point (focus and recompose) for birds in trees. Multiple points will usually grab a contrasty branch instead of the bird.

If you're shooting jpeg, I would recommend Landscape for nature shots, including birds. I only shoot raw, so the jpeg settings affect the look of the image on the camera LCD, but have no effect on the raw image.
Forum: Pentax DSLR Discussion 5 Days Ago  
best settings for K-3 and birding
Posted By audiobomber
Replies: 21
Views: 971
For birds in trees, I recommend TAv mode, f8 with the 55-300mm, shutter speed preferably 1/350s, but not below 1/180s. ISO floats from 100-6400 (need a good noise reduction program)

Here are my current recommendations for BIF with a K-3. I have these set in USER1 mode:
TAv mode:
- Set aperture for sharpest MTF - f/5.6 with the DA*300, f/8 if you're also using the TC. Shoot at f/8 with 55-300mm, do not use a TC. If you're shooting in dim conditions, the DA*300 is acceptable wide open, even with the TC. The 55-300 is unacceptably soft wide open.
- Shutter speed according to conditions. I find 1/1000s works most of the time. Never go below 1/500s. Don't be afraid to push ISO. Noise is correctable, motion blur is not
AF-C, Hi-Speed continuous burst:
Center AF point, with 25 point expansion. I use 9-point for sports, but birds move too fast to stay within the small 9-point array.
Matrix metering, add 0.5EV compensation, fine tune in p-p
Shake reduction Off

Custom Menu Parameter Settings:
16. 1st frame action in AF-C - Focus priority (make sure focus is on the target before shooting, or you'll have a string of misses)
17. Action in AF-C Continuous - Focus Priority
18. Hold AF status - Medium, bump up to High if required. IME, AF Hold Off or Low allows focus to drift to the background too readily.

I only shoot raw, turn off all the jpeg settings (lens correction, NR, etc). Having USER1 set for action allows me to switch over from a still subject to action with just a couple of mode dial clicks. Highly recommended.
Forum: Pentax SLR Lens Discussion 11-17-2017, 09:48 AM  
Difference between HD DA 40mm f/2.8 40 (red) and DA 40mm f/2.8 (green) lens
Posted By audiobomber
Replies: 27
Views: 969
Lens reviews on this site are interesting, but hardly the final authority. They are done without the benefit of instruments, which makes them subjective reviews. In the review you quote, they used a Limited they thought was probably defective. It appears you missed this comment on CA:

"Chromatic aberrations were comparable to the DA 35mm, though it displayed nothing near the control of the DA 40mm Limited"

Read more at: Pentax DA 35mm F2.4 vs 40mm XS vs 40mm Limited Review - Conclusion: DA 40mm f/2.8 XS | PentaxForums.com Reviews

My 40mm lenses showed comparable performance save for veiling flare and CA, as measured by DXOMark.

"Although the XS version is based on a similar design to the Limited models, it has slightly better transmission than the new HD model but it has much higher levels of chromatic aberration than either. In terms of sharpness, the HD and XS models perform similarly at the initial aperture – with only moderate sharpness, whereas the older smc Limited model has slightly lower sharpness still. At f4 the new HD model is slightly sharper in the center but from f5.6 onwards they have similar sharpness."

Pentax HD DA 40mm f2.8 Limited lens review: Compelling choice - DxOMark

I did not see any reference to veiling flare in either review. PF only looked for ghosting flare, with the sun shining directly into the lens. A hood will not help with ghosting, only veiling. As I mentioned in the previous post, when I tested my two 40mm lenses against one another, I saw veiling in several indoor photos, where I would not have expected it. I may not even have noticed the veiling had I not taken the same image with the Limited. This is not a slam against the coatings of the XS, which are excellent, but coatings cannot make up for lack of a hood. I use a hood on all my lenses and consider this a necessity for proper performance.
Forum: Pentax SLR Lens Discussion 11-16-2017, 08:15 PM  
Difference between HD DA 40mm f/2.8 40 (red) and DA 40mm f/2.8 (green) lens
Posted By audiobomber
Replies: 27
Views: 969
I disagree that the 40mm XS is as good as an smc DA 40mm Limited. I owned both at the same time. Chromatic aberration on the XS was disturbingly prominent and not addressed by standard CA suppression in LR. DXOMark agrees on this point, showing double the CA for the XS version. Also, shooting without a hood is not acceptable to me, veiling flare was obvious vs. the Limited with its tiny hood, even on images taken indoors. Sure, you can add a hood, but then the smaller size is lost. I believe the XS uses plastic elements for cost and weight savings, the Limited uses glass, as in the DA 35mm vs. FA 35mm.

I would definitely go for the HD 40mm Limited over the smc 40mm for the improved coatings and rounded blades. I would not trade my smc DA 15mm Limited for the HD version for the reason mentioned above, starbursts. Rounded blades will improve the bokeh, but there's no real bokeh with the 15mm. I've never shot with an HD 40mm but the smc 40mm could do with smoother bokeh.
Forum: General Talk 11-15-2017, 10:14 PM  
The Joke Thread
Posted By audiobomber
Replies: 734
Views: 54,380
What's that on the road, a head?
Forum: Pentax KP 11-13-2017, 07:13 AM  
Question: is the KP AF in s-af mode better than the K3"s?
Posted By audiobomber
Replies: 17
Views: 638
I have a DA*300 and HD 1.4x RC. AF-C center point is quick with my 300mm. With the 300mm and TC, focus is slow, but always dead on when it locks. How does your DA*300 work without the TC?

Your detailed description of the AF behaviour of the 560 is disturbing. I had similar issues with my DA*300 suddenly, the day before a guided bird tour in Mexico. I was able to use it on the tour, but missed a lot of shots. I returned it for repair and it was fine afterward. You might consider sending the 560 and K-3 in for a checkup. I don't have a 560, but I don't think it should work as you describe.
Forum: General Photography 11-12-2017, 08:33 PM  
Anyone else finding this dull weather interfering with their photgraphy?
Posted By audiobomber
Replies: 64
Views: 1,624
I've only seen Tundras in large flocks from a distance. They are much more timid than the Trumpeters. I feed some of these birds from my hand. Most of the swans prefer their whole corn thrown into the water. If it's on land, the ducks swarm so aggressively that the swans can't compete. I've seen the duck horde vacuum up 50 lbs of corn in 10 minutes. I always make sure the Trumpeters get their fill. Two years ago we had a brutal winter. I fed them 600 lbs of corn. I couldn't get to them last winter because of my job. This is my first year of retirement, so I will be there several times a week. They are a pitiful site in -20 to -40 degree weather.

I'm feeling better every day. I was able to have a beer yesterday and a couple of whiskies tonight, finally, after two weeks of abstention. :D
Forum: General Photography 11-12-2017, 01:56 PM  
Anyone else finding this dull weather interfering with their photgraphy?
Posted By audiobomber
Replies: 64
Views: 1,624







More images here: Browser no longer supported

Three swans in these photos, H70, L31 and the cygnets' mother are no longer with us. L31 disappeared and did not reappear in any reported trumpeter swan sightings in the past couple of years. The breeding female had four cygnets that I am ware of, She died a cruel and extended death from lead poisoning. H70 was my special friend, He was pretty much ostracized by the group because of an old wing injury that prevented flight. He was struck by a vehicle and killed while crossing a road. He left a big void, he was a real personality. I grieved for him like I would a favourite pet. One of the photos in the page linked above shows me feeding him on our first meeting, in 2008. .
Forum: General Photography 11-12-2017, 08:58 AM  
Anyone else finding this dull weather interfering with their photgraphy?
Posted By audiobomber
Replies: 64
Views: 1,624
Thanks guys, I'm pretty much past it now, but it was a hell-ride and an aggravating disruption of my life.

Timing is good for my annual winter swan feedings.There are about 10 trumpeters and 100+ ducks who visit a small patch of open water after freeze-up, where I and a few others bring them corn. The bags are 50 lbs each, and i should be able to heft them by the time the lakes freeze.

---------- Post added 2017-11-12 at 11:05 ----------



No trouble for me the first time I had one. I was told the incidence of colon puncture is about 1/20,000. I guess my number was up.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 11-12-2017, 07:27 AM  
Come to your SENSORS....$$$ONY!
Posted By audiobomber
Replies: 6
Views: 426
I cannot abide doom-sayers, and this guy is an A-hole.
Forum: General Photography 11-12-2017, 07:22 AM  
Anyone else finding this dull weather interfering with their photgraphy?
Posted By audiobomber
Replies: 64
Views: 1,624
I live in Northern Ontario. I wear a blaze orange toque or cap in the bush during hunting season, but a vest would be better.

Crap weather and hunters are the least of my worries lately. I went for a colonoscopy on Halloween day, and the surgeon punctured my colon. The ambulance ride was unbelievably painful, surgery that night to remove 4" of my bowel, followed by four days' recovery in hospital. I finished the antibiotic treatment a couple of days ago, which finally ended the side-effect headaches. I'm not supposed to lift more than 10 pounds for the rest of the month. No bush hikes for me for a while
Forum: Pentax KP 11-11-2017, 05:01 PM  
Question: is the KP AF in s-af mode better than the K3"s?
Posted By audiobomber
Replies: 17
Views: 638
What AF point(s) active in AF-S? I would only use the Center Point for birds in trees.

Have you tried using AF Adjust? I've had trouble with primes locking in the past due to front/back focus. Adjusting focus resolved the issue.
Forum: Pentax SLR Lens Discussion 11-11-2017, 02:05 PM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
There was no insult offered. Maybe a language barrier? Ignorance: lack of knowledge or information

In the context of what I said, you are advocating to withhold knowledge of equivalence from novices. I say teach them what it means, which is education, the opposite of ignorance. It's hard to teach though, against so much resistance.

Old timers didn't discuss equivalence, that doesn't mean it didn't exist or was not applicable to large format, 35mm and 110. Obviously it is a frequent topic of discussion now, and the subject of many blogs and technical articles. Denying it will not make it go away, because it is a useful concept and quite enlightening when used properly. I hope Norm agrees to provide an equivalence comparison, then we will have something more concrete to discuss. I predict that the differences in IQ will be trivial compared to the blatant and obvious similarities.
Forum: Pentax SLR Lens Discussion 11-11-2017, 01:01 PM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
What you are advocating is ignorance. Equivalence explains a great deal about "sensor plus lens" interaction and allows cross-systems comparisons. Personally, I find it highly useful.. Others do not, which is fine with me. Denying that equivalence has merit I do not understand, as it explains much about current digital photography and the performance envelope of various formats available to photographers.
Forum: Pentax SLR Lens Discussion 11-11-2017, 10:07 AM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
Spend a day on DPR's Sony NEX forum. Should I buy an RX100 or a6000 with kit lens? A6500 with18-105mm or A7 28-105mm? These are evergreen questions, and the advice, along with size and cost, always involves equivalence.



I was thinking of you when I said "refuse to understand". :lol:




I couldn't find a 100mm f2.8 macro in m4/3 or APS-C, but my reasoning is that you could use smaller diameter elements and a narrower barrel for an APS-C version.

I do evaluate lenses based on their characteristics, but one also must consider the camera the lens is mounted on. Lens and camera together determine FOV, DOF, sharpness, etc, not just the lens itself.

I'm no Fuji fan, the X-trans sensor has become a near fraudulent marketing gimmick, IMO, but they are are offering a lot of APS-C lenses and growing.
Forum: Pentax SLR Lens Discussion 11-11-2017, 09:37 AM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
Adjusted focal length already accounts for FOV.



No, the images will be very similar, assuming corrections are made for crop factor.



I disagree, per my last post. You have FF and APS-C bodies, with 35mm and 50mm primes. Why not post a comparison shot, so we can see some evidence? K-1 with 50mm f1.7 and K-3 with 35mm f2.4, on tripod, TAv mode, same shutter speed, 1-1/3 stop difference in aperture. I would do it but I don't have a FF body and do not intend to ever buy one. Or even use the K-1 in crop mode for APS-C, though that will further disadvantage the APS-C resolution (only matters for pixel peeping, still plenty of pixels for a large print.)
Forum: Pentax SLR Lens Discussion 11-11-2017, 08:54 AM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
Of course exposure is the same, but exposure with a digital camera is dead simple. The camera does it automatically, I adjust EV when required, and if not, I can very easily change brightness in post. I need to control everything else. I was trying to blur the background, like he did in the book, or close my aperture down to make sure the entire landscape was in focus.He was somewhat aware of equivalence because he said if you have a digital body, you should use one less stop than his film camera. Which would have been fine if I was shooting APS-C. Imagine the diffraction I was causing, shooting a tiny sensor compact camera at f/16.

I know you understand equivalence theory, Norm. You don't see the use of it, and Northrup's presentation style riles you up. :lol: Equivalence explains a lot of things that confuse newbies, and from this discussion, there are still plenty of experienced photographers who do not understand or are unwilling to understand what it is, and what is not. Manufacturers play on the lack of understanding by using equivalent focal lengths with real apertures. The RX10 IV has an 8.8-220mm f2.8-4 lens. It is not 24-600mm f2.8-4. Converting to FF equivalent focal lengths must also include equivalent apertures in order for me to understand the camera's operating parameters, I can calculate that the RX-10 has a 24-600mm f8-11 FF equivalent lens. Now I can compare it's operating range with my K-3 and DA 55-300mm f4.5-6.3 PLM, which is 83-450mm f6.8-9.5. Or with my DA*300mm with 1.4X RC, which is 630mm f8.4. That's a pretty impressive compact but for $2500 CA, I'll pass.




For equivalence:
  • Shutter speed, exposure and distance from the subject (perspective) must be the same

  • Focal length and aperture must be adjusted for crop factor

  • Sensors must be of similar technology (current sensors quality within 1/3 stop, the exception being Foveon)

  • Resolution will vary depending on number of pixels and lens sharpness

  • FOV, DOF, DR, perspective, diffraction and noise will all be similar. For me, this is where the meat is, and it is explained by equivalence theory, not by the exposure triangle.

.
I cannot do what a K-1 does with an FA 50mm f1.4 at widest apertures, using my K-3 and FA 35mm f2. I can get similar images from f2.8 and up. Sure, there will be some differences but the photos will be very similar in the parameters that I control and that matter most to me.



There are always two Dans. Everywhere I go, two Dans. My best friend growing up was a Dan. At work there were two Dans. Believe it or not, TwoDan1 is my Outlook email address. :D



I don't think there's much doubt that the D FA 100mm macro would have been smaller, less expensive and just as capable if it had been designed for APS-C. Long telephotos don't seem to vary much, the recent 300mm f4 lenses for Nikon FX and m4/3 are pretty similar in same size nd weight. The new 11-18mm f2.8 would be much larger and more expensive if it were designed for FF. The D FA 50mm f.1.4 would be smaller and cost less if it was a DA* lens. The reason that Pentax has the most complete stable of APS-C lenses is because we did not have a FF body. Fuji is rapidly catching up with its lens environment for the same reason, whereas Pentax now needs to pump out FF lenses.



What is it specifically that you don't agree with in the video? What is it about equivalence that you don't get?

Here is an explanation of Perceptual Megapixels: Perceptual Megapixel: Lens Sharpness Boiled Down to a Single Number

DXOMark, lens testing protocols: DxOMark lens testing protocol and scores - DxOMark
Forum: Pentax SLR Lens Discussion 11-10-2017, 12:47 PM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
I remember reading Understanding Exposure ten years ago and wondering why my Canon A720 IS 35-210mm "f2.8-4" did not look like his FF images when I used the same exposure settings.
F2.8 is NOT f2.8..
Forum: Pentax SLR Lens Discussion 11-10-2017, 12:33 PM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
Actually, it's not unusual in Canon world to buy a FF standard zoom to use on APS-C. When I started out in digital with a Pentax, I had a friend who was also getting started but with a Canon 40D. He thought 28mm was a good place for a dividing line. Start with a 28-70, add an ulltrawide and tele lens later. Since I was accustomed to 36mm FOV on my previous digicams, I must say this made sense to me as well. If i hadn't been shooting Pentax, I may have gone with a FF standard zoom.



You make a valid point. I disagree with his use of the 18-55 f3.5-5.6 to compare with a 24-70mm f2.8. He should have used a premium APS-C lens like a 17-50 or 17-55 f2.8. Also, using the Overall Score for sharpness is not very wise. Much better to use the actual measurements at each aperture in the Measurements -> Sharpness -> Field Map screen.
Forum: Pentax SLR Lens Discussion 11-10-2017, 08:31 AM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
It's good as far as it goes, but discussing equivalent focal lengths without discussing equivalent apertures is missing a critical point. He should have showed equivalent images, e.g
  • APS-C, 55mm @ f1.8, 1/4000s, ISO 100

  • FF, 85mm, f2.8, 1/4000s, ISO 250

  • APS-C 55mm, f8, 1/100s, ISO 800

  • FF, 85mm, f13, 1/100s, ISO 2000


These images would show similar FOV, DOF, DR, perspective, diffraction and noise.



The title is meant to grab attention. He makes two main points about lenses::
1. If you shoot APS-C, an APS-C standard zoom (18-55) would be a better choice than a FF standard zoom.(28-70), because with a FF lens you don't get wide angle with the FF lens.
2. Don't expect a FF standard zoom to give the same resolution on APS-C as it does on FF.

Neither point should be controversial.
Forum: Pentax SLR Lens Discussion 11-08-2017, 07:35 AM  
Full-frame lens on a crop body not advisable?
Posted By audiobomber
Replies: 168
Views: 4,607
What does he say that you consider flawed? I've heard you use the same arguments in advising people between FF and crop.

I read DPR news daily. They report on new lenses and across all systems, 1", m4/3, FF, MF. In order to understand a lens' operating parameters, I need to convert.

BTW, here's the program I recommend for NR with your K-3. It is free and full-function, but only allows you to process single images, not batch. You should be able to go to ISO 3200 with great detail and acceptably low noise.
https://noiseware-community-edition.en.softonic.com/
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