Forgot Password
Pentax Camera Forums Home
 

Showing results 1 to 25 of 300 Search:
Forum: Photographic Technique 21 Hours Ago  
How many megapixels do you need (rant)?
Posted By biz-engineer
Replies: 36
Views: 1,193
300ppi (native) may or may not look sharp. Perceived sharpness depends on how many pixels are there to describe a picture element. This is a trick, consciously or unconsciously used by promoters of cameras. Some promoters of Fuji shows us the amazing medium format details of a skin and eye of a person's face, without mentioning that the person's face cover the image frame from edge to edge. If there are 1000x1000 pixels to define the iris of an eye, the detail is for sure amazing and this has nothing to do with medium format. The same picture could be taken with an apsc camera, also showing amazing details of skin, eye, hair, provided that there are enough pixels to sample the image feature. Yarrow's photograph of an elephant, filling the frame of a D810, even printed a couple meters wide (perhaps ~100ppi native, or less), still shows amazing elephant detail. An elephant is very big, and a detail of elephant skin wrinkle is proportionally big.
Forum: Photographic Technique 2 Days Ago  
How many megapixels do you need (rant)?
Posted By biz-engineer
Replies: 36
Views: 1,193
The point is , if a subject is tightly framed with an apsc, the subject image is as detailed as it would if using 50% of a medium format frame, QED.
In other words, you can make impressive images with unimpressive cameras, given that the subject is framed more tightly. Being as close as possible to the subject. Think macro.

David Yarrow use a quote from Robert Capa "if your image isn't good enough, you aren't close enough to you subject".
While he certainly isn't referring to anything like resolution, the buy product is to be able to print very large images from a full frame camera.
Forum: Photographic Technique 2 Days Ago  
How many megapixels do you need (rant)?
Posted By biz-engineer
Replies: 36
Views: 1,193
How many megapixels do you need?

Sounds like the old boring rant.

This topic has been debated Ad nauseam, yet most people get it wrong.

Please world wide web, stop spreading wrong information.

The megapixels needed has nothing to do with print size (or screen) DPI or PPI.

The ultimate secret that no one ever told is that the megapixels needed is entirely relative to how much detail worth looking by human being, is present in an image, i.e how many pixels (image samples) are used to describe an image detail.

This secret trick has been largely used, and is still being used by David Yarrow, who produced gallery prints the size of pools table, of images captured with a D810 and D850. In all his images, the subject occupy a large part of the image frame, such that even printed 10 feet wide, the subject details still look well defined to the human eye.
Forum: General Photography 2 Days Ago  
Can too much technology stifle creativity?
Posted By biz-engineer
Replies: 54
Views: 1,045
The imaging technology is mainly promoted by camera companies to sell us that one more camera model or one more lens. IMO the best way to stay at ground zero for my photography, due to the fact that most published photography material (videos, articles, even training) is about camera gear. I found that resources about painting to improve my photography way more than anything I could read about photography. That said, if there were only a few things that contribute to my photographic results, it would be aspect ratio , format , tripod and strobe. Everything else advertised by camera manufacturer, such as AF tracking, eye AF, mirrorless, frames per second and all., doesn't play a role (for me). I'd be just fine with a three lenses (wide, normal, tele) and a camera that has a large sensor and controlled by 3 dials (ISO, shutter speed and lens aperture), plus a L bracket (tripod) and a flash trigger.
Forum: Photographic Industry and Professionals 4 Days Ago  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
I've looked at upgrading my displays that during our "stay at home" covid lock-downs, but have decided to postpone my purchase to a later time. My last year's prints have all been black & white, color gamut wasn't a concern. Also, I noticed the appearance of the new (relatively new) c-type Fuji maxima photo paper, with enhanced color gamut and fine detail reproduction to match or exceed inkjet tech. (https://www.fujifilm.com/us/en/business/photofinishing/paper-lab-products/pr...-paper-maxima#). So, yeah in the future I'll go back to color prints, my color calibrated monitor is almost 10 years old (only slightly better than sRGB), and I'll need a wide gamut monitor for editing, something like the DELL PremierColor series.
Forum: Digital Processing, Software, and Printing 4 Days Ago  
Debating Software choices
Posted By biz-engineer
Replies: 28
Views: 773
I did my best to avoid Adobe / LR until now, using a bunch of other tools to do what I want for free. But let's be honest, it looks like Adobe have a kind of leadership or monopoly here. LR+PS is probably the only software than offer all in one processing options to cover anything I'd ever need to catalog, edit and print my images. Over the years, I've looked at Adobe alternative, but there is always something that those tools don't do or don't do as well as Abobe LR/PS.
Forum: Photographic Industry and Professionals 5 Days Ago  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Being curious about that. I noticed VA panels are significantly cheaper than IPS and, on paper, VA can also have a nice color gamut (DCI-P3). 32" VA display can be purchased new for 350 euros or less (if I remember correctly), 32" IPS is at least double the price. I've seen some cases of black levels being crushed in VA panels, and bad color/lighting homogeneity with large displays (32"). My datacolor color calibration will only make a calibration profile from measurements done only in one area of the display. The reason why I avoided to buy a VA display.
Forum: General Photography 5 Days Ago  
What lenses for 4x5 ?
Posted By biz-engineer
Replies: 25
Views: 900
Space needed at home for such equipment? Looking at enlargers for sales at B&H, it looks like larger than 24" isn't very common. I don't know how low of quality by flat bed scanner would compare to purely optical enlargement from neg. to photo paper. Digital scanner type Epson V700/V800 is much smaller to own.
Forum: Photographic Industry and Professionals 5 Days Ago  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Yeah, paper is backwards. Somehow, the generalization of mobile phone photography and ubiquitous social media makes me enjoy prints more. Print talk is boring until we realize how enjoyable is reflected light (light reflected off a paper print) as opposed to backlit display (LCD, OLED displays). Worse are all those ultra bright VA panel gaming monitors optimized for refresh speed, brightness intensity, with overly saturated colors. When I look at a paper print, it doesn't jump at me, it doesn't shout at me, it just looks natural, and I find it more relaxing and enjoyable then looking at a gamer's display.
Forum: Photographic Industry and Professionals 6 Days Ago  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
What happens, in absolute terms, image quality of a specific camera / system doesn't diminish when a newer model is being released. I reckon most of my camera and lens purchases came from my needs and wants having changed over time. If my needs / wants wouldn't change, I would have kept using the same gear for many years and eventually just buy something new after one element of my camera kit would stop working. Turned out, Pentax being late in the full frame "game" actually saved me a lot money, while others (Canikon) had purchased three full frame upgrades, I was still using apsc, but I was having an eye on the D800E / D810. When Pentax went straight to the D810 equivalent K1, I bought it, without needing to go through the 12Mpixels D700, 24Mpixels D600 and 36Mp D800E/D810. With Pentax I skipped 2 camera upgrades compare to if I was having F mount lenses.
Forum: Digital Processing, Software, and Printing 06-13-2021, 11:03 AM  
Where do you print in Canada nowadays?
Posted By biz-engineer
Replies: 16
Views: 584
With the same paper, print settings such as resolution and Dmax can be traded for speed. Low cost labs set the machines for optimal speed, high end lab set the machine for better print quality.
Forum: Photographic Industry and Professionals 06-12-2021, 09:15 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
That's a good idea :-). Yes, 8K 32" is something like 7680 pixels / 72cm, close to 300ppi of the prints. I'd just have to zoom in to match the width of the monitor and scroll up / down to cover the entire image at its final print size. My graphic card doesn't support 8K, arrhhh, only a small detail. But... I got the idea, uploaded the picture to my phone, and zoomed in to equivalent print size, with the high density OLED display of the phone we see every detail without being limited by the display.
Forum: Pentax News and Rumors 06-12-2021, 03:37 AM  
PF Pentax Interview 2021 - Question suggestions
Posted By biz-engineer
Replies: 178
Views: 9,542
Can be bought used for under $1K, without any compromise on feature set.
Forum: Photographic Industry and Professionals 06-12-2021, 03:25 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Even 32" isn't large enough for 24x36"prints. Print and displays don't show the same things. Even with larger screen, I'm not sure if I would notice all things that become visible in full size print.

Example: on a print I could see some organic element (small tree leaf or somthing) floating in mirror-like water plane. On the display, it's not something that caught my attention, but on the print it looks exactly as if the print surface has been scratched. After I made one print, I figured that detail out, then I cloned it out of the digital photo, and it looked great again both on print and display.

Other example: fringing, not from the lens but from an ND filter and directional light. software usually correct lens aberrations based of radial distance from lens optical axis, but that's not the way square filters produce fringing. Before I printed, I forgot to check in all areas of the frame... I only saw it too late on the print. So in prints, the first annoying things showing up aren't due to pixel count , but more often due to aberrations, motion blur, things that become visible once we're in front of the full size print. Pixel count is overrated, lens quality is never good enough and shooting conditions are often non-ideal when the photographic subject is. The highest possible image quality and resolution is on tripod with electronic shutter or a strobe, typically studio conditions, no the case of photography on the go. There is the max performance of a camera system and how often that max imaging performance practically happens.
Forum: Photographic Industry and Professionals 06-11-2021, 10:57 PM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Digital displays keep camera expectations low. That's especially true for smartphones that display photos on a small high density , high brightness display. My expectations are high for ILC cameras because I print, and barely met with the K1. It occurred to me that I spotted on physical print some fringing that I didn't see on display. More recently, I received a 24x36" print where I had apply a red filter (digital way), I have to re-print it because the red filtering created some white halo between sky and other parts of the image, this isn't visible on a small display. I can see that electronic displays create low expectations, otherwise with "fine art" prints there is virtually no limit to how good one want a camera image quality and resolution to be.
Forum: Troubleshooting and Beginner Help 06-10-2021, 11:50 AM  
KP wanted to shoot PEF
Posted By biz-engineer
Replies: 13
Views: 746
Somethings like multiexposures, or timelapse, or something, I don't remember what mode did the switch to PEF, but I remember well that I could reproduce the behavior.
Forum: Photographic Industry and Professionals 06-10-2021, 11:36 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Ah yes.... things are starting to be really really interesting. Just because it's an "old" model and not a mirrorless makes it cheap in the used market.
In one of their videos, photography-online made a side by side comparison between the Canon 5DSr and the Canon EOS R5, the 5DSr came images came out with slightly more fine details.
Since the mirrorless revolution took place from 2016 onwards, used DSLR gear can now be had cheap, with plenty of excellent lens choices.
One could buy a D810 for well under 900 euros, and a bunch of Tamron SP lenses (G2 zooms, or SP primes) for no much more. Image quality didn't drop over time.
Forum: Troubleshooting and Beginner Help 06-10-2021, 11:18 AM  
KP wanted to shoot PEF
Posted By biz-engineer
Replies: 13
Views: 746
I had that specific case of RAW format being automatically changed from DNG to PEF with the K1. It was related to using a certain camera mode or video and going back to stills mode, something like that, with RAW format not reverting to DNG automatically.
Forum: Photographic Industry and Professionals 06-10-2021, 12:15 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
Personally, I now like to have both my mobile and ILC cameras. I used to use my DSLR on a tripod, camera lens down, to digitally scan documents at home, e.g. for sending electronically / attached to messages. But I don't do that anymore, I use my phone now, because I never need more than 2K resolution for scanning/mailing, and doing it with the mobile phone is quicker than using a camera. I use the ILCs for photos and c-type poster sized prints, that's different. I guess one could use his/her smartphone for the making of medium sized photo books, mostly DIN A4, and no larger than DIN A3.
Forum: Pentax DSLR Discussion 06-10-2021, 12:04 AM  
Pentax K1 manual is 140 pages when Pentax K5 manual is 380+ pages, why?
Posted By biz-engineer
Replies: 24
Views: 1,276
When I got the K1, I didn't even open the manual, I didn't need to. As Pentax user for two decade, I switched on the K1 and immediately used it. Not only the grip felt like a glove, but the tiled menu was just straightforward. Whether 140 pages or 380 pages, Pentax manuals seldom provide practical "how to" information, it's usually a bunch on description and the user has to figure out about the purpose and when to use those settings.

There are two things that really bugged me on the K1, and it's not the manual (out of topic):
1) that tiny button up for switching SD1/2, above the 4 way controller that I eventually hit when using the 4 way controller (not enough space between buttons)
2) the fact that the camera doesn't stay in live view mode (cycling of mirror-up, mirror-down) if I hit the menu button to change some of the camera setting, even after using the camera for almost 5 years trying to work around it, I still don't like that behavior
Forum: Pentax News and Rumors 06-09-2021, 03:52 AM  
K-3 Mark III firmware V1.02 now available.
Posted By biz-engineer
Replies: 39
Views: 3,357
One testing approach for non-life-critical devices consists of only testing what's possibly used by customer. Software can have for faults in it, as long as those faults don't show-up in real life use.
Forum: Pentax News and Rumors 06-09-2021, 03:49 AM  
Shutterbug review of Pentax K-3iii
Posted By biz-engineer
Replies: 60
Views: 4,592
For a DSLR , number of AF points is more for subject tracking. Wider focus area can be valuable for focus stacking (e.g landscape, architecture scenes). Otherwise, main subject focus is seldom is frame corners.
Forum: Photographic Industry and Professionals 06-09-2021, 03:32 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
The market is smaller, sure. Most other people may use their smartphone, but I don't think I'll use my mobile for my photography any time soon. I use my mobile for "utility" snapshots, as a recording tool, but not at all for my photography hobby or occasional paid jobs.The image quality of my mobile phone is way below my requirement and choice of lenses is very limited, essentially wide (or digital crop). So, I'm still in the premium camera market segment, and I enjoy the quality of the images. When I pull my K1 out, yes, it looks like a machine, or a brick with a handle, but the images are a long distance ahead of mobile images. It's just that a phone isn't primarily designed to be a camera, while a DSLR is designed purely with the goal of making high quality images. Mobile phone images are heavily processed to look good on small shiny oled display size, but zero room for editing. FF DSLR images, even apsc DSLR images have a lot more room for post-processing than mobiles. I edited K1 pictures with my phone and looking at them on the OLED display, they look stunning, and very crisp, in comparison with the images taken by the phone camera.

More and more, I'm now being asked by some people to take photos for them because they have their smartphones but no real camera. This happened much less back in the days (about 10 years ago) when everyone had a camera bag on shoulder with a Canon Rebel kit in it.
Forum: Photographic Industry and Professionals 06-08-2021, 03:51 AM  
Thoughts: the irony of camera industry
Posted By biz-engineer
Replies: 113
Views: 4,507
The K1 has a design weakness around the flash hotshoe, in order to fit a GPS antenna, and so users had their camera damaged at that weak point. That is why, i suppose, Ricoh designed the new K3 III without the GPS under the flash hotshoe and instead sells (and will sell) a separate GPS unit. The overall solution is probably more reliable than in camera GPS, which in a way isn't a "drawback", if not considering the cost.
Forum: Pentax News and Rumors 06-07-2021, 09:22 PM  
Shutterbug review of Pentax K-3iii
Posted By biz-engineer
Replies: 60
Views: 4,592
Correct. I already have K1s, so for as long as I don't need 12 frames per second or 101 AF points, I don't need to buy a K3 III, that's it.
Search took 0.05 seconds | Showing results 1 to 25 of 300

 
Forum Jump


All times are GMT -7. The time now is 08:01 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top