dahod

Lives in Canada Alberta, Canada
Joined on Feb 2, 2008

Comments

Total: 35, showing: 1 – 20
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In reply to:

BobORama: With my basically free rig, hand operated and manually focused was good enough to produce 400 MP images of narrow stained glass panels. I have done some up to 4 gigapixels in size using a $300 telescope mounts pano mode to automate things.

Here you can see a hairline crack, 30 feet off the ground. Its not pretty pixel peeping, but its good enough. A $2000 AF 180mm Macro lens would have made this nearly perfect - I didn't have that, however. It took about 30 minutes, same as Google - all without the quadrillion dollar multi-national spy apparatus.

http://goo.gl/ULGtp2

Shift Click to zoom out Click to zoom in, the rest ask a teenager.

Very nice work - congratulations

Link | Posted on May 21, 2016 at 15:06 UTC
In reply to:

dahod: Wonder what happens to the in-camera software correction of the newer lenses in a tilt/shift environment.

That's kind of where I was going with this - software corrected lenses might be problematic (unless you have a back built to know the tilt/shift and the programming to correct for it). Maybe I'm wrong but I don't think post profiling would work since I believe it is based on an assumption of parallel focal and image planes and no shift.

Link | Posted on Feb 14, 2016 at 00:12 UTC

Wonder what happens to the in-camera software correction of the newer lenses in a tilt/shift environment.

Link | Posted on Feb 12, 2016 at 18:33 UTC as 6th comment | 6 replies
On article Sony Alpha 7R II Review (2159 comments in total)

Sorry if I'm repeating someone's earlier response but I haven't had a chance to read them all.

Michael Tapes did an interesting comparison of the Sony 7RII dynamic range vs the Nikon D810, the Canon 1Dx and the Canon 5DsR on the Luminous Landscape website on Sep 21st. While maybe not as rigorous, it was an interesting video and the Canon 1Dx results surprised me a bit.

Link | Posted on Oct 5, 2015 at 22:23 UTC as 339th comment

Good one - had me going for a while. Would have been better on April 1st though.

Link | Posted on Sep 11, 2015 at 04:02 UTC as 131st comment

Anybody know what the TIFF file size would be??

Link | Posted on Sep 10, 2015 at 03:46 UTC as 9th comment
In reply to:

dahod: Sony must have their rational for compromising the RAW files on their Pro camera. While some have minimized the potential effects, the end result is that they are compromised.

While we never can be sure, can anyone speak to legitimate reasons that would possibly drive Sony in this direction, particularly in this age of large files?

@techjedi - You're probably right - it's all about frame rates and processing power. My understanding is that the medium format Pentax 645Z can shoot full resolution (50Mp) at 3fps until the buffer is full while the Sony shoots at 5 fps (I think). I guess some will think that's important enough to accept lossy compression.

Link | Posted on Sep 3, 2015 at 00:21 UTC

Sony must have their rational for compromising the RAW files on their Pro camera. While some have minimized the potential effects, the end result is that they are compromised.

While we never can be sure, can anyone speak to legitimate reasons that would possibly drive Sony in this direction, particularly in this age of large files?

Link | Posted on Sep 2, 2015 at 19:28 UTC as 247th comment | 9 replies
On article Bang for the Buck: Olympus OM-D E-M10 II Review (717 comments in total)

I could be wrong but as far as I know it still doesn't support phase-detect autofocus and 4/3 lenses.

Maybe it's more difficult than it appears to migrate the technology from the OM-D EM1 but it's disappointing that Olympus continues to ignore their 4/3 users.

Link | Posted on Aug 25, 2015 at 16:50 UTC as 133rd comment | 8 replies
On article Lens Rentals Canada closes its doors (178 comments in total)
In reply to:

vaclav1: 1.Canada Post has 50% higher prices than USPS.
2.Canada Post is much slower than USPS.
3.I have shipped hundreds packages via USPS, no one was lost, Canada Post is unreliable.

Hi danmar
That's true and if you're fortunate you don't have a problem. My only point was that in every good business model, you need to have an efficient means to resolve customer problems quickly and Canada Post lacks that. At least in our area, it's not very well defined and you seem to fall into a black hole. I think there is room for improvement there.

Link | Posted on Aug 13, 2015 at 13:40 UTC
On article Lens Rentals Canada closes its doors (178 comments in total)
In reply to:

vaclav1: 1.Canada Post has 50% higher prices than USPS.
2.Canada Post is much slower than USPS.
3.I have shipped hundreds packages via USPS, no one was lost, Canada Post is unreliable.

Maybe you've been fortunate and not needed it, but every good system needs to have a mechanism to resolve problems if they do arise. This is one area that Canada Post needs to improve. In our area, you get a 1-800 number that gets you a recording. Going to the Post Office gets you a poorly copied form that you can fill out and leave with them. In every case of mine, nothing ever came of either. Canada Post adopts the position that nothing is their fault and you need to work with the sender to resolve it. Very poor customer service model.

Link | Posted on Aug 6, 2015 at 03:28 UTC
On article Lens Rentals Canada closes its doors (178 comments in total)
In reply to:

vaclav1: 1.Canada Post has 50% higher prices than USPS.
2.Canada Post is much slower than USPS.
3.I have shipped hundreds packages via USPS, no one was lost, Canada Post is unreliable.

Agreed - my experience has not been good with them - lots of damaged and lost parcels and a non-functional resolution process.

Other countries do much better.

Link | Posted on Aug 5, 2015 at 18:57 UTC
On article Lens Rentals Canada closes its doors (178 comments in total)

Only in Canada.

You'd think we'd want to make sure Canadians have the tools and systems in place to successfully compete in the new economy but unfortunately it seems to be beyond us.

A "made-in-Canada solution" is apparently an oxymoron - so sad.

Link | Posted on Aug 5, 2015 at 17:40 UTC as 29th comment | 2 replies
In reply to:

agentlossing: Four Thirds sensor???????

Maybe a mistake? Hardly seems logical, though I like the double assurance that micro four thirds seems to be covered.

The earlier review by DPR (http://www.dpreview.com/articles/2966580105/samyang-and-rokinon-formally-introduce-100mm-f2-8-macro-lens)
had some comments regarding 4/3 and 1:1. If I understand it correctly, we'll still get 1:1 for 4/3 sensors but not at the minimum focusing distance.

Link | Posted on Jul 7, 2015 at 02:38 UTC

Interesting - I thought there were some pretty significant points raised but it seems Nikon considers them irrelevent.

Link | Posted on Apr 10, 2015 at 22:05 UTC as 139th comment
In reply to:

dahod: As a 4/3 user, I have to admit I'm interested in this lens. Even though Olympus had it on their roadmap for a long time, they never came through with it. I do have the 50mm f2.0 but something longer would be nice and manual is fine.

Maybe somebody can help me out here. The stated magnification is 1:1 for this lens (full frame). What would it be on the four thirds sensor?

Thanks for the input.
If I understand it correctly, the 1:1 is constant for the given lens, focal length and minimum focusing distance but the apparent magnification is greater on the 4/3 sensor because of the narrower field of view. You'd have to move back to get the whole FF image onto a 4/3 sensor.

Link | Posted on Apr 6, 2015 at 16:23 UTC

As a 4/3 user, I have to admit I'm interested in this lens. Even though Olympus had it on their roadmap for a long time, they never came through with it. I do have the 50mm f2.0 but something longer would be nice and manual is fine.

Maybe somebody can help me out here. The stated magnification is 1:1 for this lens (full frame). What would it be on the four thirds sensor?

Link | Posted on Apr 3, 2015 at 18:36 UTC as 18th comment | 7 replies
In reply to:

Horshack: I went to Samsung's booth at CES to play with the NX1. I was very impressed both with the camera and the competence of the Samsung rep - he knew the camera front to back and was able to answer every question I had, including some very technical questions.

I must be missing something then - sorry. Not bashing Samsung - just didn't see the lens offerings you're mentioning (web site goes as high as 150mm in the zooms and 45mm on the primes). Is there a preferred portrait lense? Also, 150mm is still a long way from extreme telephoto. Can you point me to the lineup you're thinking of?

Link | Posted on Jan 14, 2015 at 04:38 UTC
In reply to:

Horshack: I went to Samsung's booth at CES to play with the NX1. I was very impressed both with the camera and the competence of the Samsung rep - he knew the camera front to back and was able to answer every question I had, including some very technical questions.

Agreed- the camera is impressive

Now they need to be equally impressive with respect to lens offerings and customer service.

Link | Posted on Jan 13, 2015 at 21:15 UTC
In reply to:

PazinBoise: I think the last technical hurdle that mirrorless cameras need to clear in order to surpass DSLRs is AF tracking. Mirrorless camera's AF tracking has gotten a lot better but most DSLRs systems are still better at tracking moving subjects. Once they are on par with DSLRs in that functionality I don't think DSLRs will have much left to offer?

Lens selections? Lenses can be made to fit new mounts. Optical Viewfinders? Each generation of EVFs gets better and better and the advantages they offer over a OVF are great. Weather sealing and build quality? Oly OM-D E-M1 and Fuji XT-1.

I really can't think of other features that DSLR offer that can't be integrated (or have already been integrated) into mirrorless systems.

I could be wrong but my understanding is that Olympus uses in-camera software correction to help keep the size and costs of their mirrorless lenses down.

If that's the direction everyone's going then the days of cross-platform lens sharing might be over (unless the companies are sharing software which I doubt)

I haven't seen any optical bench testing of just the lenses (only system testing with the camera) so I have no idea how good the lenses by themselves (without in-camera correction) would be on a different camera. Maybe somebody else has better information??

Link | Posted on Jan 13, 2015 at 21:05 UTC
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