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Messages - Mt Spokane Photography

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5056
Lenses / Re: Manual Focus Lenses: Smarter in F-Mount?
« on: September 22, 2012, 07:26:31 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.

Not all adapters are Klutzy (good term!), just most.  Of course I'm biased, I make adapters (that are 5X more expensive than the norm).
You are excused ;D   I'm a fan of your Canon FD to EF products.
 I did not realize that you made Nikon to other Body adapters.

5057
Lenses / Re: Photozone's review of the EF 24-70 f/2.8L II is up
« on: September 22, 2012, 07:23:09 PM »


I struggle to believe there is that much sample variation.  My hunch tells me that maybe one of the reviewers may be off the mark with their testing.   I think I will reserve judgement until the next set of reviews come through.

Here is a video from a few years back about Canon manufacturing a 500mm f/4 lens.  You get a idea about whats involved.  THere are three parts, this links to part 1.  You can easily find the others.
 
Canon Lens Production 1

5058
Lenses / Re: New Pancake Lenses
« on: September 22, 2012, 06:58:22 PM »
Unless we get a 28mm pancake, 40mm is about it.  I really don't expect a new one soon.

5059
Lenses / Re: Photozone's review of the EF 24-70 f/2.8L II is up
« on: September 22, 2012, 04:48:22 PM »


I must admit I didn't think that sample variation in lenses was so large.  For two reviewers to produce such differing results is an eye opener for me.
If you are talking near perfect lenses, particularly a zoom, then 2300 is dirt cheap.  You are not going to get it for less than 30-40K

5060
EOS Bodies / Re: 46.1mp Canon DSLR Previewed at PhotoPlus 2012? [CR1]
« on: September 22, 2012, 04:45:18 PM »
That does seem to be consistent with other reasonable rumors I've read over the past several weeks.

5061
Site Information / Re: Why do some posts get locked for no apparent reason?
« on: September 22, 2012, 04:43:57 PM »
Posts get locked when the posts get out of control, some user tries to post to a 6 month old thread, or when there is no point in keeping it open.
Without knowing exactly which you are discussing, its impossible to venture a guess, but there are several that admins locked due to out of control posts.
Trolling posts are usually locked or removed, so if some troll signs up and makes a one time gibberish post, that might be locked.

5062
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.

5063
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 ;) )

5064
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. 

5065
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.

5066
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.
 
 

5067
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.
 

5068
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.
 

5069
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. 

5070
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.
 

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