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Forum: Digital Processing, Software, and Printing 1 Day Ago  
Fixing Adobe's problem with maps in LR 5 and LR 6
Posted By TonyW
Replies: 3
Views: 258
While annoying and frustrating for users of LR 4, 5, 6 and early CC versions that one part of a working application failed, perhaps Adobe stance is not totally unfair.

Support for all these products in the LR line up finished some time ago and was well published.

The issue has been caused by Google actually changing its API calls. Adobe is under no obligation to fix this type of problem caused by others making changes.

Good to see however there is a workaround for those users that wish to stay with older non supported applications
Forum: Troubleshooting and Beginner Help 4 Days Ago  
Disappointed by the K-m photos :-(
Posted By TonyW
Replies: 47
Views: 1,726
Although I have zero experience of the lenses you mention or indeed the particular camera I do agree with others that those images are of poor quality and generally I would expect to see better even from old lenses (assuming they had no issues with cleanliness or coatings)

FWIW my impression from what you have posted:

1. Images too soft Are the lens elements front and back totally clean?

2. Did you move the camera from a warm to a cold environment prior to shooting (or vice versa)? The possibility of condensation forming on the back element in particular is there if you do not give the camera time to stabilise when moving from temperature extremes?

3. Possible focus point issue (front focusing ??)

4. Atmospheric issues on the day of shooting?

5. As far as noise is concerned it is possible that it is more noticeable due to the fact of having flat and less than sharp images. Grain and noise can actually make a sharp image appear even sharper. The real problem with noise evaluation, however, is looking at images at 100% zoom in your editing application. Assuming that you have a 'standard' resolution monitor (close to 100 PPI) then you are looking at a much-magnified version of your image compared to what you are likely to be seeing in the real world viewing conditions. As an example if you were sending to print, let's say to a Fuji or Canon printer then you are probably seeing your image data magnified by a factor of 300%. FWIW a higher resolution monitor will likely display less noise and your images should appear somewhat better resolved than on a standard display

Before condemning lenses I would suggest making a series of tests under controlled and repeatable conditions to ascertain how well these lenses can resolve detail under ideal circumstances.
  • On a clear day set up a test subject that you can always go back to and repeat

  • Set your camera on a tripod

  • Focus on a specific area (and make a note where!)

  • Use a cable release

  • Mirror up (if available)

  • Make a series of exposures at different apertures (expect wide open to be the poorest example)

How do these images appear in your editing application now? Remember you will still need to apply some sharpening to raw images while JPEGS should be good to go depending on your camera settings for this mode
Forum: Digital Processing, Software, and Printing 01-09-2019, 04:02 PM  
.dcp file compatibility between Lightroom and RawTherapee?
Posted By TonyW
Replies: 8
Views: 336
The example posted was merely to show differences in raw editor rendering using the same dcp profile. That particular profile originally produced not to be accurate to anything but to reduce excess red content in skin tones. IIRC, to aid a fellow forum member who seemed to be having issues with certain images.
Forum: Pentax K-1 01-07-2019, 02:20 AM  
Photo District News puts K-1 at #6 for color reproduction.
Posted By TonyW
Replies: 12
Views: 1,240
^^ This.
This was enough to convince me that the testing and conclusion very poor - unless of course a user only ever shot JPEG AND happened to prefer what the camera manufacturers committee had decided was a pleasing rendering at a default or standard preset (what about all the other JPEG presets how do they reproduce colour?)
Forum: Digital Processing, Software, and Printing 01-06-2019, 10:00 AM  
.dcp file compatibility between Lightroom and RawTherapee?
Posted By TonyW
Replies: 8
Views: 336
Yes they are compatible, however bear in mind that the rendering will not be exactly the same between the Adobe ACR engine and the RT engine - at least that was my thoughts when first looking at this.

Attached shows same DCP profile (reduced red for skin tones) in Lightroom (top) and RT 5.4
Forum: Digital Processing, Software, and Printing 01-05-2019, 11:28 AM  
Converting Adobe dcp profiles to icc?
Posted By TonyW
Replies: 6
Views: 349
I would question the value of ICC camera profiles when DCP available. ICC profiles can be used for many purposes printer displays etc, they are not designed specifically for camera profiling whereas the DCP profile is. ICC profiles need to be pre processed for a profile to work

I know that this does not directly answer your question but if you have already shot a colour checker passport, SG etc then you may produce both DCP and ICC profiles using something like Lumariver Profile designer (IMHO an excellent program!)

Lumariver
Instruction manual
Lumariver Profile Designer

Good enough reason to ignore ICC profile creation and stick with DCP ?

There are/were some options to do online conversion but no idea how sucessful and in any case the limitations listed above may make it not worthwhile
Forum: Digital Processing, Software, and Printing 01-03-2019, 05:22 AM  
ACR and Camera Profiles in Lightroom
Posted By TonyW
Replies: 3
Views: 350
AFAIK there is no camera raw update available for your K-1 II in the last perpetual licence of LR v6.14. The good thing is as you have found out you can at least use DNG's.

I assume that you meant to say that you downloaded Camera Raw 11.1 direct (as it will not show in LR update dialogue) from a website? Perpetual Lightroom versions will only accept particular Camera Raw versions and therefore this is the reason your 'install' of Camera Raww 11 failed (it may be on your system but LR will just ignore it)
Forum: Pentax SLR Lens Discussion 01-03-2019, 04:11 AM  
Should i let Dxomark make me down or not?
Posted By TonyW
Replies: 43
Views: 1,585
d.I have no personal experience of the camera or lenses you speak of but like others I would urge caution when considering 'Test reviews'. There is a big danger of really overthinking this.

I cannot believe that the majority of modern (and many old!) lenses produce less than very good quality - at least somewhere in their range with the best in class performing excellently at all apertures and across their whole field.

Remember also that your digital cameras Bayer systen is only at best around 50% efficient in terms of resolving power i.e. your 24 megapixel camera can only deliver about 12 megapixels of resolvable detail - so on the face of it the lenses you quoted are all delivering at least technically enouth for the task at hand?

You may be better served by asking questions about a specific lens/lenses here and if possible consider hiring a lens or purchasing from a brick store that may give you the opportunity for sale or return - just a thought :)
Forum: Digital Processing, Software, and Printing 12-28-2018, 04:01 AM  
How to Print Accurately?
Posted By TonyW
Replies: 36
Views: 1,727
That sounds very strange and I can only guess that it is the image file you have received that has been incorrectly rendered - possibly on a very poorly set up monitor?

I agree that Qimage is a great printer application with more control than LR for instance.

Not had huge experience with Qimage but I cannot see exactly where you would change to the Apple RGB option or why this should work as Apple RGB is a synthetic editing working space

Changing the Display Profile to Apple RGB would make no sense as you are now totally disregarding your monitor calibration and profile.
Changing the media type other than to glossy or matt etc. also does not appear to make sense in changing colours too much

Changing the Printer Profile to your particular profile is the only one that makes sense and I do not believe that you can actually alter that to anything other than a paper profile (so no Apple RGB or Adobe RGB available)
On these images what is the embedded profile? If it happens to be Apple RGB have you tried converting it to Adobe RGB first then importing to Qimage and selecting the correct paper profile?


The HP printer is very well regarded and as long as you are getting good paper profiles (seem to be the case with Ilford) and other prints are fine it does to me at least strongly indictate the possiblilty of bad data in the particular images editied on the Apple Retina display
Forum: Digital Processing, Software, and Printing 12-23-2018, 10:50 AM  
Monitor Recommendation
Posted By TonyW
Replies: 6
Views: 446
Eizo Coloredge or NEC Spectraview if you are serious and your budget can stretch. If a touch too expensive consider a smaller size maybe 24”.

Entry level Eizo 24” Self Calibrating LCD Monitor ColorEdge CS2420 - EIZO
Eizo Monitors | Wex Photo Video
Hardware calibration is a feature I would always go for. Allow fior a decent calibration device X-Rite i1 Display very good.

I purchased an Eizo CS240 a few years ago IMO best bang for buck at that time

A less expensive option that gets some good reviews have a look at BenQ range with hardware calibration
Forum: Pentax Camera and Field Accessories 12-19-2018, 02:52 AM  
What filters are you guys using?
Posted By TonyW
Replies: 13
Views: 556
Wow, that is a crazy example of something gone very wrong. Perhaps you were just unlucky with yours? Manufacturing fault or other I would not like to say.

What I was expecting to see is a slight colour cast either towards red/pink or blueish, depending on mnfctr. Typical Cokin from what I have seen

https://www.flickr.com/photos/brentbat/2372603825

My own mention based on the cheap set I got from the bay. Cerainly a match for, if not better than the Cokin example. Still no match to a good quality optical glass from other well known mnfctr that will produce a neutral image without the need for much post work
Forum: Pentax Camera and Field Accessories 12-18-2018, 03:44 PM  
What filters are you guys using?
Posted By TonyW
Replies: 13
Views: 556
I guess that’s a price to be paid for cheap, but...

Can I ask what you mean by bad colour cast, what filter and was the cast not fixable in post I.e something like a cross curve situation?

Not suggesting that your experience wrong but trying to guage expectations and level of the problem
Forum: Pentax Camera and Field Accessories 12-18-2018, 01:03 PM  
What filters are you guys using?
Posted By TonyW
Replies: 13
Views: 556
Have you considered Lee filters maybe a little more expensive than Cokin but a pretty good range and quality should be a step up?

I am fairly sure that as far as polarising filters go you will need to opt for circular type that sits within the frame.

Lee website allows you to tailor the system to suit - if nothing else it may give you some ideas
LEE System Match - find the recommended System for each of your lenses.

Go cheaper and surprisingly good Zomei
ZOMEI150mm Full Color ND2,4,8,16 filter+77mm ring+holder+16 slotCase For Cokin Z | eBay
Forum: Digital Processing, Software, and Printing 12-17-2018, 09:32 AM  
Eco Preset for LightRoom
Posted By TonyW
Replies: 2
Views: 368
Not familiar with ECO but should be easy using collections or similar and once output to folder then zip prior to sending; Would this work for you?
Image Copyright Workflow With Using Adobe Lightroom | Lightroom Fanatic
Forum: Digital Processing, Software, and Printing 12-12-2018, 04:56 PM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
Not easy to suggest target levels for luminancea and contrast for printing - so many variables.

The best I can offer is that IF your goal is to match print to screen then you first must make sure that as well as calibration you are properly illuminating your print near your monitor.

If you see a print that is too dark, is it really printed too dark or is it the illumination falling on it? Seems obvious but if we have candlelight illuminating a painting then it can look quite dark and lacking detail; turn on a light and that same painting can spring to life and offer detail we could not see before. Before deciding too dark take your print outside, to another room or in its final resting place, how does it look know?

Often overlooked it is important that the print illuminated to a standard, 4700 K often touted (even though your monitor at D65) as good starting point. Even better if you know where a print is going to be viewed and average lighting in that area you could try duplicating the source colour and luminance (a step too far maybe reserve for exhibition?)

Then in an ideal world your white point will match your paper white and contrast range

I would ignore D50 or 5000K for now (mine for a special requirement). What you need to try and match is the brightness and contrast range of your paper.
A wild guess to provide at least some figures. Assume a paper that is close to your chosen D65 with a contrast range of say 250:1. If you set luminance to 100 cd/m2 and Black point to 0.4 cd/m2 you are at 250:1 contrast ratio. Leave Gamma to 2.2 or native
Forum: Digital Processing, Software, and Printing 12-12-2018, 02:28 PM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
The links are really key to show how a monitor should ideally appear (read the comments that go with the various tests)

Have attached a rough guide to how images too bright or too dark luminence settings may appear using the Lagom page as an example. Too bright and you will start to loose highlight seperation and may open shadows too much. Too dark and you will loose seperation in shadow area (that may appear in print) and your highlights may be falsely compressed. Ideat is just the appearance of the slightest tonality for the lowest black square similarly with highlights you really want to see the lightest tonality at 254 checkerboard. Not all monitors are capable at both ends of the scale. If at whatever level you have calibrated to you cannot see close to the ideal image then it could suggest less than optimal viewing conditions (TBH that is likely to be the case anyway unless you have a dedicated area - I make compromises on this like many). BTW Gamma and Contrast will also have a bearing on what you can see

Bottom line is that you could be far enough out to affect print quality (too dark, too light) without noticing anything bad. Most monitors I have seen in others environments are generally too bright






QuoteQuote:

.... I've been using D65 with a gamma of 2.2, since that seems to be recommended for general office and web use (and I therefore assume if there is any level of standardisation within the rest of the viewing world at large, it's likely to be this or close to it). As for luminance, I'll try 110cd/m2 and reference to those links you've provided.



D65 and 2.2 gamma is a strong recommendation from many and I am no exception. In the matter of monitor luminance there is no right single answer and no one can give you a meaningful figure without experiencing and measuring your viewing environment (which I suspect changes on a daily/hourly/seasonal basis). A general suggestion is aim somewhere between 80 - 120 cd/m2 (but go higher if warranted by testing). Some monitors have trouble at the low end 80cd/m2 with black seperation, so you will just have to see. Where this really becomes crucial is if you desire to match your prints to screen and you are printing your own.

. As you do not intend to print much if anything at home then the issue of white point is less of a problem. D50 is not really recommended by most for a number of good reasons. D65 is likely to be closer to many papers you will encounter and will certainly be a more pleasant working space. Unless you are working with old CRT monitors or need to comply with certain ISO standards then I would suggest forget D50.
Attached is a comparison between D65 and D50 environments (accurate enough for this purpose). Below the monitor are two papers one Canon glossy and the other Marrut Satin. Marrut is the target and is set for soft proofing. Which most closely matches paper white? If you cannot match paper white how can you expect to print to match screen (more complex than this really but...)

Sadly I think many labs pay lip service to colour management. For instance they will tell you that you can download their paper profiles but you must send them an sRGB file - reason bexause they really do not do or understand colour management or they are too lazy to bother. Send the same image data to 12 different labs and it is likely that you will get acceptable prints back but none will actually match for density contrast or colour. This has not changed since the analogue days. Anyone with an image on a monitor of a nice holiday scene or indoor christmas shots should be able to make a pleasing looking image from some unknown source sending them an sRGB file
Forum: Pentax Medium Format 12-12-2018, 11:35 AM  
It's all about the size (of the viewfinder)
Posted By TonyW
Replies: 20
Views: 1,022
:D Ok. So why mess around with any awkward cameras? Buy (or make!) one of these, set your chosen aspect ratio, close one eye set the distance from your eye to the frame to mimic focal length. Explore to your hearts content and when finished just slip into a shirt pocket. :D;):cool:

Clicky
Forum: Pentax Medium Format 12-12-2018, 09:38 AM  
It's all about the size (of the viewfinder)
Posted By TonyW
Replies: 20
Views: 1,022
Weird is OK :lol:. Are you missing anything, well if you just like to look rather than take pictures then you are definitely missing out. Nothing sharpens and focuses the photographic mind like looking at the upside down view of the world via a view or monorail camera under a focussing cloth loupe in hand :)
Excuse the crepe mock up:o

https://blog.lesterpickerphoto.com/wp-content/uploads/2011/06/hood.jpg
Forum: Pentax DSLR Discussion 12-12-2018, 06:46 AM  
ISO vs. Dynamic Range
Posted By TonyW
Replies: 20
Views: 1,180
Absolutely agree we really do not know what is happening (do they fully (really and truly :hmm:) disclose their testing methodology?), but we can only hope and trust that their testing is consistent and repeatable time after time camera after camera.
Forum: Digital Processing, Software, and Printing 12-12-2018, 12:35 AM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
Benq Master Palette Element (for SW2700PT: is the calibration/profiling application it is available as an iOS or Windows download onlyat least AFAIK.

It may use a selection of calibration pucks, but the software supplied will not work to communicate directly with the monitor so hardware calibration is out without BenQ software - well that is my understanding as I have not used the monitor
Forum: Pentax DSLR Discussion 12-11-2018, 05:10 PM  
ISO vs. Dynamic Range
Posted By TonyW
Replies: 20
Views: 1,180
for various reasons including him already producing 645z figures did not think worth doing. I know that the did ask around the forums and got some rude comment back from here (from memory that is and hope to be wrong!)so I guess he moved on
Forum: Digital Processing, Software, and Printing 12-11-2018, 04:48 PM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
from what I have heard the BenQ SW2700 is a pretty decent monitor with a good spec. Not Eizo NEC territory yet but neither in their price bracket. Check it out as I thing it adds Big Bang for buck

BenQ SW2700PT 27" Widescreen LED Backlit QHD SW2700PT B&H
Forum: Digital Processing, Software, and Printing 12-11-2018, 04:41 PM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
Just a quick thought as I am off to the land of Nod.

Hope you do not mind a comment and a quick tip or two bearing in mind no single correct answer and if it works for you fine but...

160 cd/m is much higher than I would expect to go even editing in fairly bright daylight ambient lighting. Have a look at a site I always send people to
White saturation - Lagom LCD test
How do the whites look you should see separation up to 254 if not you are clipping
Black level - Lagom LCD test
How do the blacks appear next to complete black should only just be distinguishable - if all appear just dark grey then you are pushing too high

Why D50 for printing and why gamma 1.8, has someone recommended this?

Do you like working in D50 for some reason?

Does D50 match your paper colour and contrast when viewing your print near to screen just take a sheet of printing paper to compare - if screen looks too yellow or too blue compared to printer paper and/or too light then D50 may not be a good match.

If you are happy fine if not you may want to keep D65 and invest in a viewing light of around 5000k or the excellent Solux bulbs 4700k. Just a quick check to see why a particular workflow
Forum: Digital Processing, Software, and Printing 12-11-2018, 03:45 PM  
Working with UHD 4K 100% AdobeRGB display - some questions
Posted By TonyW
Replies: 110
Views: 2,498
Great to hear that you are impressed at first view (so you should be after the outlay!). FWIW 160cd/m2 might be too high for printing unless you address print illumination correctly to match (last I heard Schewe was using somewhere around that figure but with a GTlite booth for print)
Forum: Pentax DSLR Discussion 12-11-2018, 01:54 PM  
ISO vs. Dynamic Range
Posted By TonyW
Replies: 20
Views: 1,180
I believe the data, at least Bill Claff's do actually reflect reality as they are a measure of real world data with a reasonable degree of accuracy of what you would expect a particular camera system to capture in terms of DR

Dxomark on the other hand have a different method of measuring DR (no less valid but...) I believe on photographing a backlit Stouffer test object resulting in a higher than expected DR level

For example Dxomark rate the DR of the Pentax K1 @ ISO 100 as 14.6 Ev. So they are getting higher DR values than would be expected for a 14 bit capture system. Does this mean anything significant in the real world, perhaps not. EIther the testing methods just work out to be a little OTT or could the camera system be actually capturing more than 14 bits?

Bill Claff’s testing methods suggests a photographic DR of about 11.43 Ev which sounds somewhere near plausible to me. I have tested my own 645z against his measurements using a Sekonic meter and found that we are very close (his probably more accurate than mine). This kind of breeds confidence in me that he is on the same page as I am (in fact probably a chapter or two in front!). Cannot compare Dxomark for the 645z as they pulled it and made some excuses (from memory -3Ev in real world vs Dxomark) - it did come out at the time as the best they had seen so go figure!

TBH I do not think that it really matters too much as long as you are comparing apples with apples by using one set of test data to estimate differences. So use either but do not try and mix and match.

In the real world there are a myriad of reasons to choose a particular camera and buy into a system. Most systems will have some benefits that others envy and vice versa. I doubt that anyone is really going to swap a system for a two stop DR advantage alone
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