Ian Stuart Forsyth

Ian Stuart Forsyth

Lives in Canada Canada
Joined on Oct 16, 2010

Comments

Total: 36, showing: 1 – 20
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On article What is equivalence and why should I care? (2319 comments in total)
In reply to:

kpaddler: Your summary is simplistic and incorrect when it is considered in absolute terms.

If you argue that when you downsample/upsample images to one size and compare them, then yes, the larger sensors fair better, not surprising. If that is what you argue, then do so, but there is little value in that when you are trying to explain "brightness" of different sensors, but this is opposite of educating people.

A yellow flower with light value of x at 100iso, f2.8, 1/125sec, will produce exactly, 100% same light value on sensor regardless of sensor size or focal length.

I'm objecting to your summary paragraphs, not what you know.

Let’s use your argument but instead of digital we use film
I have 2 cameras, one is the 35mm and the other is 6x7 and I load the same film(same generation of sensor) into both.
I select the same DOF & FOV for both cameras and in doing so the larger format camera I have to select a slower shutter speed to accommodate the more light I am able to put on to that film. This is the opportunity.
Now if I want to put the same amount of light into the 35mm camera to do this I have toselect a slower shutter speed the same as what I used in the 6x7 camera, what will happen to the image in the 35mm camera.
The opportunity arises for the larger camera if you cannot find a slower film to accommodate that longer shutter speed of the larger format

Link | Posted on Nov 3, 2016 at 16:56 UTC

Its about time,
but darn that price that's a tuffffff little pill!
oh well I guess I am going to be limited to buying one used after someone is done playing around losing interest with the lens and sell it with very little mileage

I really hope that sigma or tamron has something in the works

Link | Posted on Oct 19, 2016 at 04:41 UTC as 39th comment | 2 replies
In reply to:

trainingpants: "thus carving car tracks permanently into an area where rain is a rarity"

Really? So the tracks left by the rocks have been there permanently too?

Here's a clue for all of you who don't seem to have one. When it rains, the rocks move and they make tracks. Guess what happens to those tire tracks the next time it rains? They'll disappear!

Sure driving on the pristine lake bed is thoughtless, stupid, and possibly even a misdemeanor. But let's get some perspective. The Park Service won't be able to "erase" the tracks, but the next rainfall likely will. And if you still want a picture of the pristine lake bed where there are some undisturbed rock tracks, just walk over to the next one. It's an awfully big lake and the vandals surely didn't obliterate every square foot of the surface. There's your clue. Have a beer and calm down. You're welcome.

trainingpants
"thus carving car tracks permanently into an area where rain is a rarity"
Really? So the tracks left by the rocks have been there permanently too?
Here's a clue for all of you who don't seem to have one. When it rains, the rocks move and they make tracks. Guess what happens to those tire tracks the next time it rains? They'll disappear!
Sure driving on the pristine lake bed is thoughtless, stupid, and possibly even a misdemeanor. But let's get some perspective. The Park Service won't be able to "erase" the tracks, but the next rainfall likely will. And if you still want a picture of the pristine lake bed where there are some undisturbed rock tracks, just walk over to the next one. It's an awfully big lake and the vandals surely didn't obliterate every square foot of the surface. There's your clue. Have a beer and calm down. You're welcome."

and you wonder where the stupid people come from
Nuff said

Link | Posted on Oct 8, 2016 at 05:54 UTC

Just stupid

I would think that a 1 year ban on their driver licenses, take their truck as its the property of the park and if they try and fight it in the courts add a $50,000 fine and let the courts set an example.

At sometime I think we as society are going to have to put a dollar value on protected lands and any penalty's will reflect what that value is.

Link | Posted on Oct 8, 2016 at 05:51 UTC as 4th comment
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

Class A: The K-1's sensor was measured by DxOMark. They call it a "Full-frame marvel" and it currently sits at 4th position in the overall ranking, beating cameras costing almost twice as much.

In all measurements the K-1 beats the D800 and even D810 at the same ISO setting. Only because the D810 has a lower ISO setting (64 rather than 100), it receives a higher dynamic range score.

A (real) lower ISO setting is of course a legitimate advantage (the Pentax K-5(II) put a lot of APS-C competitors behind it with its ISO 80 setting), but it is still impressive what Pentax manages to get out of that sensor for the supported ISO range.

The K-1 is even very close in performance to the leading Sony models with their high-end 42MP sensor. Another testimony to the fact that the Pentax engineers did a marvellous job!

@ Favorable Ex

You might want to understand what the sports score on DxO is and how it related to photography. How does the ranking of 3rd on DxO contradict DP ?

Link | Posted on Sep 17, 2016 at 03:54 UTC
On article Opinion: Park vandals need to be stopped (338 comments in total)

If my old man caught me doing this 3 things for sure would have happened.

The first, he would have broken his belt buckle

The second, my summer would have been spent standing at the rock with a sign around my neck saying look at what stupid did.

And the third I would be working off the damage i had done

Link | Posted on Sep 7, 2016 at 16:31 UTC as 44th comment
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

GrayW: Hmm... it seems that AF-C on a static tripod with the subject weaving in and out of the focus field isn't a very good test of the K-1 real world AF capabilities.

At Rishi. S
To be fair you should post test under conditions at which the D810 failed
at the same rate as the K1 to give a stark contrast. Or use less dominate AF lenses ( Cheaper) like the 70-200 F4 to show what it would take $$ to have equally performing systems

Link | Posted on Jul 17, 2016 at 08:04 UTC
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

jkhush05: It has been a fair review, Pentax are not known for the best AF in the industry and it comes as no surprise, but some of the wordings of the reviewers are bizarre. Like what excatly does one mean by the AF is a failure? The only failure here is DPR's failure to get the most out of a camera, that while not a blazing fast sports camera, is quite a capable all round shooter. Clearly if someone wants to get action photos with a K1, they certainly can. Will it be as easy as pointing the camera in the direction you want and let it do all the work? of course not! but can you take action shots? definitely, enough Pentaxians have proven that!

Action photography is not only about keeping your camera still and letting the AF chase the subject. With enough practice and skill, people can take better action photos with a far lesser camera. So its unfair to say a camera is not capable of taking action shots at all, not as effortless as other brands, but it can get the job done if used right

If it tracked your son and had not focused behind him it would not be a problem

Link | Posted on Jul 11, 2016 at 08:28 UTC
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

jkhush05: It has been a fair review, Pentax are not known for the best AF in the industry and it comes as no surprise, but some of the wordings of the reviewers are bizarre. Like what excatly does one mean by the AF is a failure? The only failure here is DPR's failure to get the most out of a camera, that while not a blazing fast sports camera, is quite a capable all round shooter. Clearly if someone wants to get action photos with a K1, they certainly can. Will it be as easy as pointing the camera in the direction you want and let it do all the work? of course not! but can you take action shots? definitely, enough Pentaxians have proven that!

Action photography is not only about keeping your camera still and letting the AF chase the subject. With enough practice and skill, people can take better action photos with a far lesser camera. So its unfair to say a camera is not capable of taking action shots at all, not as effortless as other brands, but it can get the job done if used right

At LightBug if this is what you think of as action photography then yes it can,
But others have a very different standard. ;)

Link | Posted on Jul 11, 2016 at 05:51 UTC
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

Professor999: Do any other brands have 'Catch-in focus'?

The problem is that you need to predict where the subject going to be

Link | Posted on Jul 9, 2016 at 07:30 UTC
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

ogl: If to compare K-1's AF with Nikon D5/D500 and Canon 1Dx - it's really worse
But is there any sense in such comparison? No.

Nikon 810 is very close to K-1's AF - it depends on lenses, of course.
Some of Pentaxians have the both cameras and found K-1+85/1.4 is even better than D810+85/1.4G.

@ RS The D810 test is not comparable as you are using 3DT and I find that where you tested it puts it near the limit that I would use 3DT and also remind people that 3DT is not an option with the K, If I was to use 9pt d and manually tracked the target the out come would have been stellar. It is also worth noting from my use with the D800 with the 70-200 F4 /F2.8 that the F2.8 version is better at than the F4.
So if people want to complain just remind them that test was done with a lot cheaper lens that DFA 70-200 F2.8

Link | Posted on Jul 8, 2016 at 06:56 UTC
On article Under pressure: Canon vs. Nikon in a hydraulic press (287 comments in total)

He killed Cookie Monster !!!!!!

Link | Posted on Jul 8, 2016 at 06:30 UTC as 84th comment
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

Henrik Melander: So the head of the biker is outside of autofocus points yet you use this point evaluate focus?

Yes as the camera should not have fired off the shot and let it did even when there was nothing infocus throughout the AF points. This tells me more than I need to know

Link | Posted on Jul 6, 2016 at 22:01 UTC
On article Special K? Pentax K-1 Review (2660 comments in total)
In reply to:

dnscott645: I have shot over 11,000 shots with the K-1, mostly concert photography. I have used the camera only in the AF-S mode with a 95% keeper rate. I suppose the reason DPR did not do as well with it, is that they are not as familiar with the subtle differences in the operation of the Pentax system as opposed to the Nikon or Canon systems. The focus indicators come on when you press the shutter half-way; at that point you can fire the camera pressing the shutter the rest of the way, or lift up and refocus. You can also hold the focus keeping the shutter half-way, move the camera to recompose, then press further for the exposer.
The 25,000 ISO is incredible. A friend of mine was quite impressed with results of a photo I sent to him from the K-1 at 25,000 ISO: he said the results from his Canon 5D-mark III at 25,000 ISO was mush and not usable. We have the same rate of keepers with our autofocus systems.

@ Rishi
People don't understand the complexities of AF performance and the difficulties of tracking a subject at working distances thru shallow DOF. If we take a look at some of the complainers of you review you will see that many of the actual images they refer to as to your AF review is faulty they are comparing images that are of subject at distances where the DOF is in the meters.
For example tracking a car at 100m with a 200mm @f5.6, at this time I would hope we can achieve this with most higher end cameras. Even panning and tracking a moving car or airplane I find it seldom very hard with a 70-200 F4 lens and 1.4 TC .

If your testing is so flawed and all the people are right then we should see numerous threads with people shooting using the same conditions showing how wrong you truly are in your results.
There is a reason why the old action MF shooter have a lot of images at working distance of 80m using a 200mm @ F5.6 we hid our focus errors.

Link | Posted on Jul 6, 2016 at 09:35 UTC
In reply to:

falconeyes: Is the tape / filter glass to block the phone's infrared receiver a part of Apple's patent?

Now I have a place to store my gum while shooting,
I can't shoot and chew gum at the same time

Link | Posted on Jul 1, 2016 at 09:20 UTC
On photo Smile Ilford FP4 in the My favourite Film challenge (30 comments in total)
In reply to:

OttoVonChriek: The link where you can see a color version is here:

http://www.dpreview.com/forums/post/57685972

Interestingly Tin Eye also found a copy of this photo credited to user 'Anne Dixon' on myfinepix.com

Certainly the photo's in Ted's gallery show an interesting range of cameras. Are they all his or is there something we should be told :D

Which brings me not to believe a word you say as snowy was also entered into another challenge were it was listed as Fujifilm fine pixs.
http://www.dpreview.com/challenges/Entry.aspx?ID=330967 here
And if we take your word that it was scanned with an Epson scanner here http://www.dpreview.com/challenges/Entry.aspx?ID=973320

I would really like to know what color manager you use for scanning film as you have exactly the same red color in both of the enters listed above. I know with scanning negatives that there would be no way I could get that very same red using digital camera instead of scanning flim. I am starting to believe less and less that it was ever taken with a film camera.

Link | Posted on May 3, 2016 at 05:49 UTC
On photo Smile Ilford FP4 in the My favourite Film challenge (30 comments in total)
In reply to:

OttoVonChriek: Yes, there seems to be little doubt that this was not shot on FP4.

Of course if it's disqualified then there will be no trace of it.

If we leave the entry here then even if it's withdrawn these comments will remain as a testimony to what a loser DigitalTed is.

Leave or Disqualify? Wha' d'all think?

I would leave it, this way we have a record

Link | Posted on Apr 30, 2016 at 01:57 UTC
On photo Natures Art in the My Best Photo of the Week challenge (3 comments in total)

Thank you

Link | Posted on Jan 28, 2016 at 05:01 UTC as 1st comment
On photo Aquamarine in the My Best Photo of the Week challenge (2 comments in total)

I could not help but feel that if you showed the entire wheel that it would make for a nicer framing with all that said I still like it.
ISF

Link | Posted on Jan 18, 2016 at 04:22 UTC as 2nd comment
On article Opinion: The myth of the upgrade path (1615 comments in total)
In reply to:

name here: Full frame with the right lenses can be amazing (assuming you care about pixel integrity, micro contrast and all). The combination tends to be very big.

If you want small & are willing to comprise a tiny bit of image quality, there are so many fantastic options out there.

All in all, I fully agree with this article.

What I'd caution against is: FF without the right lenses (slow, subpar etc) is probably no better than APS-C (or even u4/3) with top quality lenses. So, FF is just 1/2 of the equation. Only, coupled with right lenses, FF does make a big difference. Else, again, you're probably better off with a smaller and less expensive system.

@ Yuvalm
The same way you cannot use a aspc 200mm lens and crop it to the Fov of aspc 300mm lens and expect it to compete with the resolution of that 300mm lens.

Link | Posted on Jan 29, 2015 at 07:06 UTC
Total: 36, showing: 1 – 20
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