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Messages - Mt Spokane Photography

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4921
Canon General / Re: Hasselblad anounced a new 24.3 mirorless APS-C camera
« on: September 22, 2012, 04:35:42 PM »
Its for those who must have the very best, and believe that paying $6500 will make it so.  They will undoubtedly have supurb customer service.

4922
Lenses / Lens Tweaking Service
« on: September 22, 2012, 04:31:10 PM »
I was wondering if there was a market for a lens tweaking service for enthusiasts and smaller profesional users. 
Obviously, cinema photographers rent lenses that are carefully maintained, but say someone wants to purchase a new 24-70mm f/2.8L and wants it tweaked to its best possible resolution, and wants a test report showing how good it is.
I realize that each lens is not equal, and no amount of tweaking can make a lens perform beyond a certain point.  Those 14 or 18 elements all have a tolerance, and the tolerance stackup makes for lenses that are going to vary. 
However, it is possible to eliminate decentering and align things so that they are the best they can be for that particular lens.
A test report would be provided to show sharpness at various focal lengths for zooms.
We can send in a lens to Canon and pay a few hundred dollars to have it tested and adjusted, but just how good is it when they are through?
Maybe someone already does this? i'm not thinking of doing it, just speculating. 
It might even be something that a person can make a living at.  Software and test charts are available, so it only takes the know how to adjust the lenses and the investment in a proper test facility, lighting, etc. 
 
I was also thinking of a business that sold lenses which have been tested and adjusted, but what would one do with the X% that were not top performers but still met manufacturer specs?  Buyers would only want the best of the best, of course.  That doesn't sound very practical.  I guess you could sell the rejects on ebay.  (Kinda like Hills Brothers coffee bean rejects ;) )

4923
Lenses / Re: Photozone's review of the EF 24-70 f/2.8L II is up
« on: September 22, 2012, 03:52:07 PM »

Honestly, I think that when you pay 2150€ for a pro-grade lens sample variation should be minimal and barely noticeable, while in this case they seem worlds apart. It's just unacceptable, it can't be a lottery. Not for this price. This lens is 25% to 350% more expensive than any Zeiss lens.

I've seen 3rd party manufacturers like Sigma, Tamron and Tokina bashed here for much much less and for 400€ priced lenses. At least let's all be objective about the epic fail that it is - for one reason or another.
Zeiss lenses have also had huge variations that testers have reported, so I'm not sure why you think they are any better.
Is it really possible to make a lens for under $30 or 40K that has miniscule variation from unit to unit?  Lens have 14-18 elements, and the possible number of tolerance combinations is huge, so even with tight control of tolerancs, each lens would need to be hand made and thats where those huge cinema lens prices come in. 

4924
Software & Accessories / Re: canon extender vs others, what to get?
« on: September 22, 2012, 03:46:20 PM »
Thanks for your answer, well I think you misunderstood me, I obviously don't use AF for video, haha :)
It is only for photography, but I'll look at that kenko TC! Thanks
Yes, I misunderstood, since you asked about the extender part in with your video use.
At any rate, the Kenko seems the only possibility and I'm considering buying one as well.

4925
Lenses / Re: Manual Focus Lenses: Smarter in F-Mount?
« on: September 22, 2012, 03:42:51 PM »
I was wondering, since we all know Nikon lenses can be mounted on Canon bodies but not viceversa, is it not smarter to buy manual-focus-only lenses always in Nikon mount and buy an adapter?

That would minimize the inconveniences of side-grading, and would make expensive lenses such as Zeiss, Voigtländer and Schneider-Kreuznach a very safe investment.

Is there any disadvantage I'm neglecting? Any problem with aperture control?
As long as its a totally manual lens, you only have to deal with the somewhat klutzy adapters.  If I were buying a new lens and it was available in Canon mount, thats the way to go.
However, in terms of being able to resell a manual lens, having one that could be adapted fit Most DSLR bodies might have the most value.
Not only can a Nikon F lens be adapted to Canon, but also to Sony/Minolta, and a few others.  That increases the possible number of users who might want to buy it.  Just watch out, many of those old Nikon lenses have odd protrusions or other gotchas.
Of course, buying vintage medium Format lenses with their very long flange distance would allow them to be adapted to almost any DSLR.  The old Zeiss Hasselblad Distagon T* lenses are fairly good and low priced for a Zeiss lens. I've adapted one, and I love the smooooth manual focus.
 
 

4926
Lenses / Re: Photozone's review of the EF 24-70 f/2.8L II is up
« on: September 22, 2012, 03:24:05 PM »
Klaus is a tough grader and tells it like it is.  I like his reviews!
However, Lens Rentals has the advantage of having several lenses to test, and Roger showed us what a average lens could do.  Testing one or two lenses is a tough proposition, since sample variation is a real thing. A tested can only look for obvious defects and if there are none, then the lens should be typical--- except that it isn't.
 

4927
Software & Accessories / Re: canon extender vs others, what to get?
« on: September 22, 2012, 03:10:38 PM »
Hey guys,

I m getting a 5dm3 at some point next month (upgrade from my 550d) i currently use a 100-400mm L and will prob get the kit lens with the 5d. Now that upgrade to FF i'll loose some length and was looking into adding an extender to my gear. (cost effective)

I earn money with making videos, but I love to take photos of wildlife, now I've been looking at some extenders, the Canon 1.4 III seemed to be my first choice, but I read it had AF  problems on f/8, also I don't really know much about extenders and what others options to consider.

Any suggestions please?
1.  The Canon 5D MK III does not autofocus while taking video, so AF with a extender is a moot point.  If you want AF while taking Video, check out the T4i.  Its not fast AF during video, but it does work.
2. FYI, except for 1 series bodies thru the 1D Mark IV, no bodies AF at f/8. and with Canon extenders, the camera recognizes the f/8 equivalent and will not even try to autofocus.
3.  Sometimes a lens will AF using live autofocus with a TC and taped pins (non reporting TC).
 
Now, before anyone jumps in, I will say that many have reported that the latest Kenko 1.4X extender does AF at f/8 when used with a 1D X, and some have had success using it with the 5D Mark III and certain lenses.
I tried using my 100-400mmL on my 5D MK III with pins taped and it did not work, but the Kenko seems to actually help out.
Your best option is to get or rent a 600mm f/4, but many of us can't afford it much handle the weight.
So, buy a Kenko TC at a place where it can easily be returned if it does not work out.
 

4928
EOS Bodies - For Stills / Re: AF point comparison - D600 vs. 6D vs. 5D MkIII
« on: September 22, 2012, 01:16:59 PM »
1.  Upgraders tend to stick to the same brand.  This is a fact proven over and over.
2.  Spec sheets only tell a small part of the story.  They don't mention missing features, and don't tell you anything about how well the features actually work.
3. I just ignore reviews of performance based on spec sheets, they are not going to be of any real value.

Generally speaking you are right, but nothing in these cameras is really new, so I think it's not that crazy to compare how the same technology works in current models.

The D600 is basically a D7000, whereas the 6D is a... 600D.
If you believe that, then they are APS-C cameras. 

4929
EOS Bodies - For Stills / Re: Watch those CF pins on your 5D3
« on: September 22, 2012, 11:54:15 AM »
The pin / socket arrangement on CF cards violates rule 101 of connector design. 
Sockets go on the power side, pins on the non powered side. 
It was designed by a total klutz.

That is total rubbish.
Having spent 30 plus years desiging pin and socket interfaces for electronic equipment, including being a member of International design standards orginations, I can say that the industry experts and manufacturers agree with me. Problem is thats its too late to do anything about it, so manufacturers do the best they can to design a camera so that the cards and pins can be aligned without scooping.  Even so, I've had DSLR's with bent pins.  Its not frequent, but very expensive to repair if you can't straighten it.
 

4930
EOS Bodies - For Stills / Re: Looking for an new Camera
« on: September 22, 2012, 11:45:18 AM »
7D is your best answer.  There is no Mark II model in the near future, maybe never. Several threads keep popping up with the same question.
As a alternative, a good used 1D Mark III might be in the same price range, and is a big step up from the 7D.  You can also buy used 5D Mark III's for a reasonable price. If you want a crop, a 1D Mark IV is the best crop body Canon has made.
Even a 5D Mark II is better all around, except for the better AF on surrounding AF points, so it might be limited for birds in flight
If in the USA, check the Canon refurb store.  At 12 AM sunday, they have a additional 20% off.
Any camera better than a 7D is going to cost more, its just a matter of how much more.
As to noise, shoot in raw and use one of the better raw converters.  They do a far better job now than they did three years ago.  The new firmware for the 7D also updated the jpeg processing, so that is better as well.

4931
EOS Bodies - For Stills / Re: AF point comparison - D600 vs. 6D vs. 5D MkIII
« on: September 22, 2012, 11:34:14 AM »
1.  Upgraders tend to stick to the same brand.  This is a fact proven over and over.
2.  Spec sheets only tell a small part of the story.  They don't mention missing features, and don't tell you anything about how well the features actually work.
3. I just ignore reviews of performance based on spec sheets, they are not going to be of any real value.

4932
EOS Bodies - For Video / Re: Problems with Canon mk3 locking up
« on: September 22, 2012, 11:27:45 AM »
Hi mate,
I had this happen to me while filming a Wedding on the weekend. Exactly as you described. One 12 minute file was recorded and then I was at the end of the second 12 minute file and it started to go in slow motion and then the screen froze with the red record dot in the right hand corner. I turned the camera off and the image was still on the LCD? Then I pulled the battery out and turned the camera back on and I'd lost the file. Two questions

a) Can you recover the file (it's meant to be a mov file but now appears as a zero kb dat file
b) Can you get Canon to fix this. I know that Canon wrote you a polite email back which more or less said that they can't do anything. But if you and I are having this problem is this for us to deal with or for them to fix? My Mark III is still under warranty.

To give you some ideas of what I was shooting with, I had a 70-200 IS on at the time, I'm using Sandisk 32gb 60mbs CF cards and genuine canon batteries. The climate I was shooting in was on the cooler side probably around 20 degrees so I don't think this is an overheating related problem.

I look forward to your reply, Hugh : )

Hey Hugh, I had the problem again today too :( . I lost 12 mins of a wedding ceremony on one camera!! I sold all my sandisk cards and switch to 32gb Lexar 1000x But still the same issue, so the problem isn't with the cards! One thing we have in common is all the times it has happen to me I have been using a canon 70-200 IS II lense! maybe this is where the problem lies? Has anyone else with this combo had problems? We really need to get onto this and get canon to fix it ASAP, this is a major fault which renders the camera useless for events if you can not trust it!
Those having the problem need to write it down and send it to Canon.  Go to a video dedicated forum where users post who may be Canon makers of light, when they mention the issue to Canon, it has more impact.
Unless Canon gets a lot of similar reports with enough details that they can repeat it, it gets lost in the noise of reports from those who have user errors.

4933
EOS Bodies / Re: DxOMark Sensor Performance: Nikon vs. Canon
« on: September 22, 2012, 11:15:26 AM »
...Are the DxO tests rigorous enough to be published in a serious scientific journal? Very likely, no. But for what they are meant to do (publicize a software), they are outstanding.

As I stated, their testing methodology is rigorous, and the data are of high quality.  It's their data interpretation that's flawed.

Yes, this.
+1
How they arrive at their numbers is very questionable.  However, if you look at their data rather than their sensor score, you can find out what you need to know.
Trying to give weight to numerous important parameters and put them into one score doesn't work, it does not tell you if a parameter you value highly is being given a low weighting.

4934
Despite the bolded sentence above, note that you'd need to have the IS system active (via shutter half-press or AF ON press) for >1 s to have it effectively reduce mirror/shutter vibration but not reduce sharpness.  If you just AF then shoot, the IS hasn't settled down yet - and that may explain Marsu42's observation of reduced sharpness with the 100L and 70-300L, both of which have tripod-sensing IS.

Yes, that's exactly it - with the blurred tripod shots I was focusing and then immediately shooting while I     unconscious wait a little when hand-holding and looking through the viewfinder.

To prevent this effect my choice for tripod work would really be still "old schoold" IS off + mlu + 2sec timer, but I'll try to compare this to Canon's choice when I have some time - mlu deals with the mirror movement, and I doubt shutter movement has a large impact on sharpness (or does it)?
I've found that for normal reasonably fast shutter speeds, IS isn't really needed until I get around 300-400mm equivalent focal length.  Most of the time, I could turn it off and never worry.
With a crop body which has a high pixel density like the 7D, IS is useful at a much reduced focal length.

4935
EOS Bodies - For Stills / Re: Watch those CF pins on your 5D3
« on: September 21, 2012, 06:05:11 PM »
The pin / socket arrangement on CF cards violates rule 101 of connector design. 
Sockets go on the power side, pins on the non powered side. 
It was designed by a total klutz.

in this case ... not so! Can you imagine the amount of bent pins, if all those pins were sticking out from the CF cards???

It really beats me how one can bend the pins inside a CF card slot. The cards are mechanically coded with those grooves along the side ... without brute force one shoult not be able to insert them far enough to damage pins. And the right way in, they also should not damage the pins. I have never had a single problem with CF cards or CF slots all those years .. neither electrical nor mechanical.

I do agree, that SD-connectors are better. But the cards are too small for me ... i drop them all the time. ANd I really like that CF cards have the data controller onboard whereas SD-cards are totally dumb.
Bent pins on a cheap CF card can likely be straightened, or it can be tossed.  The cost to have Canon fix the camera is very high.
Actually, there is a design method where you shroud the pins that could be applied to the card.  Its the normal low cost way to get around the bent pin where they are exposed.  There are even better designs that resist bending but still use pins.
The CF Card is a very old design, and has lasted for far more years than would have been expected.  That pin design is not going to be changed, but hopefully successor cards will not use it.
As far as bending pins in a camera, the alignment is pretty good, but like anything else, poor manufacturing can result in out of tolerance parts or sloppy build.  If the 5D MK III is having more bent pins than normal, something is wrong somewhere along the line. Maybe a tooling issue for the camera, or a subcontractor issue.

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