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Forum: Troubleshooting and Beginner Help 3 Days Ago  
Maximum sharpness achieved? or lens not capable
Posted By CarlJF
Replies: 11
Views: 652
Adding to what the other said, here's some other points to watch if you,re into getting the most details out of your pictures:

Keep ISO at 100. Picture #3 is taken at 1600 and you should not expect top IQ and details at this ISO if best absolute sharpness is what you're lookinbg for.

You didn't specify if you in RAW or if these are JPEG from the camera. If you want the best IQ, shooting RAW and PP are the way to go.

You also should have realistic expectations when comparing with pictures you see on websites like 500px. Many people there are using high resolution camera with high end glasses. Don't expect the same amount of detail from your K-50 and a 40 years old lens than with a 36-50MP FF camera with modern pro glasses. People aren't paying thousands of dollar for these kits if they could achieve the same results than with an 16MP APS-C camera and an old manual lens...
Forum: Contest Voting 5 Days Ago  
Sticky: Poll: Contest Poll VOTE NOW - Photo Contest #134 Poll (The Sky - October 2017)
Posted By CarlJF
Replies: 49
Views: 3,582
Congrats to everyone in the contest. They're all great pictures, really.
Forum: Pentax DSLR Discussion 6 Days Ago  
Thinking of Making a switch away from Pentax. is it right or just gear envy?
Posted By CarlJF
Replies: 119
Views: 3,894
Before buying anything, I would check the lens for a front/back focus issue. Based on my experience with the 55-300, this lens is very good at F/8, particularly below 250mm. Even wide open it's still very good in the center and can produce quite decent results on scenes where edge sharpness aren't critical. Having to stop down to F/13 to get anything sharp is highly unusual for this or any lens.
Forum: Pentax KP 11-14-2017, 12:03 PM  
Pentax KP Long Exposure performance
Posted By CarlJF
Replies: 12
Views: 424
I've often done exposures between 2-4 minutes with both a K-500 and a K-3. The KP can certainly do as well if not better.
Forum: Pentax DSLR Discussion 11-13-2017, 07:41 AM  
Thinking of Making a switch away from Pentax. is it right or just gear envy?
Posted By CarlJF
Replies: 119
Views: 3,894
If a 6D and the 70-200 f4 is what you need, then why not just get a DA* 50-135 2.8 for your K-70 ? There isn't anything you could do with the Canon combo that you couldn't do as well with the Pentax one. If fact, you could probably do more with the Pentax since you'll get stabilization and the used Canon you see on the cheap are probably the non IS version of the lens. Used, the DA* 50-135 is about the same price as the Canon 70-200 f4 non IS.

On the other hand, the 55-300 isn't about top quality, it's about affordable reach. On a 6D, you will need to buy a zoom covering at least to 450mm to get the same reach. The Canon 100-400 L isn't any cheaper than a DA* 60-250 for your K-70... If you don't want to pay more for the high end Pentax glass relative to the 55-300, I don't see why paying even more for Canon glass would be more acceptable or cheaper...
Forum: General Talk 11-11-2017, 08:18 AM  
Question for native english speaker
Posted By CarlJF
Replies: 13
Views: 419
Thank you guys! This is exactly what I was looking for!



Yeah, sometime popular expressions doesn't even make sense in different countries sharing the same language. Even formal expressions often have no meaning when directly translated. Or, even worse, have a meaning but a subtely different one. This reminds me the first time I received an email ending by "Yours truly", which could be interpreted in french by something like "Forever yours"! It's kind of confusing to see this at the end of a quotation from a sales rep you only met for a few minutes! I thought for a few seconds that she had a crush on me and not just simply being polite!
Forum: General Talk 11-11-2017, 06:44 AM  
Question for native english speaker
Posted By CarlJF
Replies: 13
Views: 419
Hi guys!

I've a small question for you people who are english native speaker (are as good as one!). How do you call it when for an event with gifts, let say Christmas, each people secretly pick the name of another person and has to buy the gift for this person ? The litteral translation from french would be "gifts pick" but I don't think this has the same meaning in english...

Thanks!
Forum: Pentax Q 11-03-2017, 10:17 AM  
Looking at a Pentax Q, but I have some questions
Posted By CarlJF
Replies: 18
Views: 734
To give a better idea about the size, here's apicture of some of my Q lenses. The 02 zoom is about the same size as the 06. Which is alsoits biggest drawback. Although it's small, it's nevertheless quite large for a Q lens: a standard zoom with variable aperture as big as a constant f/2.8 telephoto zoom...

Forum: Pentax Q 11-03-2017, 09:21 AM  
Looking at a Pentax Q, but I have some questions
Posted By CarlJF
Replies: 18
Views: 734
The all around zoom is called the "02 Standard zoom" and is 5-15mm F2.8-4 zoom. On a Q7-QS1 it's coverage is equivalent to a 24-70 on a FF or 16-50 on an APS-C camera. It's a pretty good lens and can be found for less than 100$.

But my favorite lens is the "06 telephoto", a 15-45mm F2.8 zoom with a coverage equivalent to a 70-200 on a FF. A very good light and fast telephoto giving really nice results. It's also quite affordable at about 150$.

Optically, the best lens in the Q lineup is the "01 Standard Prime". It's a 8.5mm F1.9 prime lens with a coverage similar to a 40mm on a FF or a 27mm lens on APS-C. It's an excellent lens but as with any other prime, isn't the best for all situations. It's also not that easy to find on the market relative to the zooms.

Many people love the 08 Wide Angle zoom. I don't have it, so i can't comment much on it beside saying that it's quite expensive.
Forum: Photographic Industry and Professionals 11-02-2017, 07:55 AM  
Nikon firing nearly 10% of photo staff and shutting down DSLR lens / compact plant
Posted By CarlJF
Replies: 70
Views: 2,262
Take one in your hands and you'll understand why. They feel like a cheap 50$ P&S. It's kind of a turn off for many people willing to spend a good amount of money on an alternative system.
Forum: Pentax Q 11-02-2017, 07:30 AM  
Looking at a Pentax Q, but I have some questions
Posted By CarlJF
Replies: 18
Views: 734
It depends on the model. Q/Q10 is 5.6, Q7/QS1 is 4.6



Yes with and adapter. But it's not that practical since it's only manual focus and any auto mode working with aperture will not work. And there's no way to know which aperture is used with lenses without an aperture ring. Also note that all these lenses will behave quite differently than on the KP. Even the DA15 will be a short telephoto on the Q.

For a backup plan, it's much better to use native lenses for the Q. The native lenses already cover up to 45mm with an apertue of 2.8. There's no practical reason to use an adapted lens shorter than this without a significantly larger aperture like the DA15, 21 and 40. The DA35 may be useful for macro work only, but for anything else it's much less trouble to use the native lens. I have used the DA70 and although it works, it's still much more practical to use the native 15-45 2.8 zoom and crop a bit or walk a few steps closer to the subject than to bother with the adapter.



No adapter support autofocus or automatic aperture.
Forum: Pentax SLR Lens Discussion 10-31-2017, 10:07 AM  
Lens Aperture and Sensor Size
Posted By CarlJF
Replies: 48
Views: 1,438
There's no need to learn any new tricks, because there isn't any. You already mentioned that you know how to control DOF by chnaging the aperture. This is still the case with any camera. No matter the format, you already know that fully opening the aperture will give you the minimum DOF for this specific camera lens combo. There's no need to translate this into FF, or any format, equivalence. Because if the DOF is okay for what you want to achieve, you don't care about equivalence. And if it's not enough, calculating the equivalence will not help you to get a thinner DOF with this specific equipment...

It's better and more productive to know your equipment and what it can or can't do than calcuting equivalence relative to some gear you don't have or may not even exist...
Forum: Pentax Full Frame 10-30-2017, 07:17 PM  
Thought FF (k1) would give me. Significant increase in light gathering vs k70
Posted By CarlJF
Replies: 18
Views: 1,343
I don't know why, but recently we see on PF and other forums this misconception that the rules of exposure work differently on FF camera.

In the situation you describe, a K1 will allow you to use a faster speed by increasing the ISO about a stop more than the K-70 will allow you. So it's somewhat true that a FF allow you to use a fadter SS, but not because it's lens gather more light.
Forum: Pentax Q 10-30-2017, 06:57 PM  
Would you recommend the Q7 for a beginner?
Posted By CarlJF
Replies: 22
Views: 993
Why do you care now ? You said in your post above that it's not important...
Forum: Pentax SLR Lens Discussion 10-30-2017, 06:06 AM  
Lens Aperture and Sensor Size
Posted By CarlJF
Replies: 48
Views: 1,438
A difference easily explained by the different sensor technologies used in the K-1 and RX10.

All the discussions around the "total amount of light" are true in theory. But they're all based on the important caveat that all sensors should be equivalent, having the same sensisitivity, pixel pitch, and N/R characteristics. Outside lab testing, and even then, this caveat is rarely if ever met. Thus making this equivalence much less relevant in the real world than some would want you to think. Even more that today, with modern cameras, noise isn't a problem unless needing very high ISOs. For most people working under normal shooting condition noise isn't that much of an issue anymore.
Forum: Pentax SLR Lens Discussion 10-29-2017, 06:35 AM  
Lens Aperture and Sensor Size
Posted By CarlJF
Replies: 48
Views: 1,438
But sensor noise and sensitivity have nothing to do with lens aperture. These are totally different problems. And yes, if low noise high ISO shooting is wanted, a larger sensor is better. But this is completely independent from the lens used... Notwithstanding the fact that sensor technology will play as much a role than sensor size.
Forum: Pentax SLR Lens Discussion 10-29-2017, 06:24 AM  
Lens Aperture and Sensor Size
Posted By CarlJF
Replies: 48
Views: 1,438
If you're into low light photography, the 35 2.4 will be preferable to a 50 3.5. All this equivalence thing has nothing to do with exposure. A fast lens is a fast lens, no matter the sensor size.

As for the difference in DOF, it's just good for forum discussion. In the real world, when you're shooting, if you want shallow DOF, you'll do your best to get it with the cameras and lenses you have on hand. You work with a specific goal in mind, not in relation to some theoritical equivalence relative to a format you don't use, or may even never have used. Then, why would you care about it ? Said otherwise, equivalence isn't relevant because you adapt your shooting to the gear you're using to get the results you want. You're not trying to copy what you'll do with a FF camera.
Forum: Pentax Q 10-28-2017, 06:03 AM  
Would you recommend the Q7 for a beginner?
Posted By CarlJF
Replies: 22
Views: 993
The thing is that you don't need to buy a Q or a DSLR if you only want to learn composition. The OP's P&S can do just fine...

Prefocusing can work, but not always. There's many, many, many situations where prefocusing isn't an option. In fact, most of the time it isn't. As I said above, I own and use Q for years, I know very well what they can do and their limitations.
Forum: Pentax Q 10-27-2017, 09:42 AM  
Would you recommend the Q7 for a beginner?
Posted By CarlJF
Replies: 22
Views: 993
I had an original Q and still have and use a Q7. So, I'm quite aware of what it can and can't do and there's no denying it's a great travel kit. But it's main and only advantages over a DSLR are size and weight. If compactness isn't above all other considerations, there's no reason to take a Q over a DSLR or other hybrid systems.

The huge DOF of the Q is rather a big issue for a beginner. It doesn't allow one to learn how to control depth of field nor to experiment much with it. Which is a big problem since it's a basic knowledge every photographer must know very well. Not even talking about the many photography styles relying on limited DOF to make their effect, which are simply out of the realm of what can be achieve with a small sensor camera.

The AF is fine in good light on a still subject. But performance degrades very quickly in not so good light and is awful on a moving subject. Anyway, you can also use CDAF focusing on a DSLR if the situation required it. Any recent DSLR offers liveview focusing which will work as well or better than what is available on the Q. By today hybrid camera standards, the AF system of the Q is quite outdated if not obsolete. Today I would certainly not list the AF of the Q as a pro, rather as a con. Even at its lauch it wasn't a match for any DSLR AF system, it certainly isn't today.

But even then, the simple fact that the Q is now a dead ecosystem makes it hard to recommend to anyone unless it's really dirt cheap. It's much wiser to spend money in a supported system.
Forum: Pentax News and Rumors 10-27-2017, 07:31 AM  
New K-mount roadmap
Posted By CarlJF
Replies: 55
Views: 5,299
Something that often come to my mind is that some DA lenses could be updated to HD DFA status. The HD coating will benefit all users and the FF users would get some affordable alternatives... This also shouldn't bring the R&D down to its knees.
Forum: Pentax News and Rumors 10-27-2017, 07:09 AM  
New K-mount roadmap
Posted By CarlJF
Replies: 55
Views: 5,299
Update and upgrade of existing lenses usually aren't shown on the roadmap. So, we still could see some updated lenses arriving out of the blue.
Forum: Pentax Film SLR Discussion 10-27-2017, 07:03 AM  
Analog Film versus Digital Photography
Posted By CarlJF
Replies: 66
Views: 2,739
Yes and no...

Yes, because you can use old lenses on the latest camera and get great results.

No because if you want to get the best from the newest cameras, it's probably better to also use the newest glasses... Not only for optical reason, but other features as well, like a fast AF motor.

If you were talking with a Nikon rep, he's probably right telling that there isn't much point buying a D850 over an D810 or even a D750 if you're not planning to use it with modern high end glass. Or that he doesn't see the point in buying a D5 if you don't buy a modern, fast focusing lens to go with it.
Forum: Pentax Film SLR Discussion 10-27-2017, 05:59 AM  
Analog Film versus Digital Photography
Posted By CarlJF
Replies: 66
Views: 2,739
I'm so relieved to read that! I secretly thought that I was the only one having done that. Although my incantation were usually for the developer.
Forum: Pentax Q 10-27-2017, 05:40 AM  
Would you recommend the Q7 for a beginner?
Posted By CarlJF
Replies: 22
Views: 993
The Q line is practically discontinued, although still present in the Pentax catalog. It's really difficult to recommend a product having no future development to a beginner.

For a beginner, the best still is an entry level DSLR. Plenty are available both new and used at very affordable prices. They're very versatile and offer room to grow and explore things. The systems are all mature and will allow you to try almost anything in photography. The Q system is much more limited in what it can do, although still much better than a P&S.
Forum: Pentax News and Rumors 10-26-2017, 08:10 AM  
HD Pentax-DA★ 11-18mm f/2.8
Posted By CarlJF
Replies: 474
Views: 39,293
I totally understand this as I'm in the same situation as you.

But the poster I answered to has already spent more than what a 15-30 would have cost trying all kind of lenses ... He also seems willing to buy the 11-18, which might not be much cheaper than the 15-30 based on the fact that all other DA* zooms are 1000$+ lenses. So, I guess budget isn't much of an issue here...
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