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Messages - Mt Spokane Photography

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EOS Bodies / Re: Patent: Contact Cleaning Body Cap
« on: November 26, 2014, 11:13:21 PM »
One of the problems I dealt with almost daily before I retired was cleaning electrical contacts.  There are all kinds of inventions claimed to clean electrical contacts, some actually causing worse problems.  The real solution, is a proper plating on the contacts, its actually a plating system with layers of materials.  I had a Seiko X-Ray fluorescence machine in my lab to check samples destined for critical space and military applications.
Besides poor plating, there is the near impossible situation of plating a sharp edge or pointy pin.  You just can't do it.  Pins have to have a nice smooth radius on the end, corners the same.
Most dirty pins are actually due to a thin film of corrosion that is invisible.  It comes from cracks or porous plating, or from the sharp points and edges.
The best designs use a wiping action as the parts come together.  This wipes that microscopic film away. 
The ends of the pins in a DSLR are nicely rounded, but even so, its a weak point.  You definitely do not want to be rubbing on them more than is absolutely necessary.  The thinner that gold gets, the worse the problem is.
IMHO, the self cleaning cap is one of those designs that will do more harm than good.  The lens already wipes the contacts when its rotated into place. 
We had one prolific inventor who wanted to patent a self soldering pin.  A electric heater would be built into the assembly which would melt the solder and create a solid soldered connection after you let it cool.  It would be heated again to disconnect it.  I refused to recommend it for a patent for numerous reasons, but this only caused him to write letters to managers saying how we were not receptive to his good ideas.  I didn't think soldering on a fueled space craft, rocket, or aircraft was all that smart, it was prohibited, in fact.

Photography Technique / Re: Share 3x your own advice to yourself!
« on: November 26, 2014, 10:54:12 PM »
My first serious 35mm film camera was a Argus C3 back in the 1960's.  I was a college student, and it was the best I could afford.   I also had a conventional flash and a light meter.  I mostly shot Kodachrome II.
 I bought a Canon FT QL when I graduated and could afford it.  I built a darkroom in my garage (I had done printing in High School).  That meant I was using Ektachrome, which I did not like,  My slides had a greenish tint.  Besides B&W, I even did a few color prints, which was far to difficult.  I was working 60 hour weeks, and had little spare time to spend hours and hours in my darkroom.
Later, I bought a Polaroid as a 2nd camera.  It was easy to use, and we have many albums documenting our kids as they grew up. The only issue is that they are faded badly, and many can't even be recognizable.  I need to find time to scan what's left.
If I could do it again.
1.  No Polaroid  The prints are faded, and for all practical purposes gone.
2.  No polaroid - see above
3.  Never use color print film, those Kodachrome II slides are still pristine, while my color negatives are not.  Some of my B&W negatives almost 80 years old are perfect.
I love digital.  Each copy is a original.  I've scanned hundreds of old slides, prints, and negatives and sent out dozens of DVD's to cousins, siblings, and children.  That means that there will likely be someone who cares enough to keep copying them to new media long after I'm gone.

I'd not worry about compatibility, Sigma has the dock feature that allows you to upgrade lens firmware if any issues pop up.  It also lets you fine tune the AF accuracy with one body.
I'd get the lens over the 7D MK II.  Its going be be fine on your 5D MK III.

Sony was the other target. But it would be interesting to know if the 24-105 IS STM is the other nail in the coffin of this lens which would mean that buyers of 3rd party lenses for Canon mount significantly outweigh projections for Nikon/SOny.

Actually, I thought Nikon was the main reason for this lens to exist.  The Nikon 24-120 is expensive and a middle of the road performer.  They should be mopping up the floor with sales to Nikon users.

EOS Bodies - For Stills / Re: 7DMKII Focus keeper rate ideas?
« on: November 26, 2014, 04:12:08 PM »
AF systems in cameras are variable, and some lenses are more variable than others.  The 50mm f/1.8 has a lot of variability, for example.

EOS Bodies - For Stills / Re: 7D MK II with EF 180 mm F/ 3.5 L MACRO
« on: November 26, 2014, 04:04:56 PM »
Here is a hand held shot with my original 7D and 100L .  1/125 sec, ISO 200.  I never use the High FPS, just take 1 shot at a time. 

Lenses / Re: Landscape Lens for Crop To Make Me Go Wow!
« on: November 26, 2014, 01:56:47 PM »
I think TDP crops between asp and FF are misleading, and probably shouldn't be compared against each other, in the same way as imatest results shouldn't be compared across formats.

I agree, comparing FF and APS-C cameras against each other is not going to mean anything, except that the FF image is usually sharper at 100%.  Comparing two different lenses on the same body will give a idea as to how they compare on that body.
Its a trap that many fall into.
DXO gives numerical ratings for a given lens, and the number varies all over the place depending on the body.  Its not a rating of the lens in any meaningful way, just of a lens-body combination.

If its true, it could mean a production issue, or a shift of internal resources.  With Japan spiraling into a depression, the cost of raw materials and employees demands for higher wages may force low profit products out of production.
Its also very possible that production facilities are needed for the new 150-600mm zooms that are expected to sell well.  Sigma is not likely going to be investing large sums of money into new facilities in a falling market.

I had heard that, and checked some online comparisons, and it was nowhere near a FF camera, at least at higher ISO levels.
I saw the NX1 at ISO 3200 being about the same as the 5D MK III at ISO 12800, not quite, but close when I view the dark red cloth detail.
I think that different people, me included, see somewhat what they want to see.
Three crops below.
5D3@ISO 12800
NX3@ISO 3200
NX3@ISO 6400

Third Party Manufacturers / Re: LuLa likes the Samsung NX1
« on: November 26, 2014, 01:03:16 PM »
I always find it interesting that LuLa falls in love with each new camera model.  They are true Hardware Geeks. 
Their review of the new Pentax MF camera has me wanting one :)

Hardware geeks? Camera geeks :)

And why shouldn't one fall in love with each new model?

It's just a pity we don't get to do that when it comes to our partners ;)

Maybe Photography Geeks? 
Do the words matter so much?  Michael has a nice article about his recent foray into astrophotography, along with not only the camera but the mount used to point it and track stars and planets. 
I like to read about his latest and greatest, and then 3 months later, when a clarification that points out why he has changed his mind, or some serious drawbacks.
Enthusiasm is catching.

Canon General / Re: Canon U.S.A. Prices going down?
« on: November 26, 2014, 12:51:28 PM »
Not sure I understand how a drop in the Yen would equate to lower prices to the customer.  Won't the company continue to sell their cameras at the usual price and just pocket the difference?

Cost increases are passed on to the customer, but I don't know if cost savings are.

While the price of a camera is dependent on the relative value of currencies, drops in price are set by the manufacturer.  If Canon raises the price in Japan, for example, then and drop in the value of the Yen in US dollars will be negated.
International companies source parts, from all around the world, so a drop in yen can mean their imported parts are more expensive, it all depends on relative value.
However, we are seeing lower prices on cameras and lenses already, and this has generally been attributed to the drop in the Yen over the past 2 years.
Generally, a big drop in yen value is not a good thing, since Japan imports so much in the form of food, raw materials and products.  Prices will rise, consumers will demand higher wages, and things spiral upwards.
This is partially offset by the ability to export more goods at lower prices for the consumers in other countries.

Lenses / Re: Landscape Lens for Crop To Make Me Go Wow!
« on: November 25, 2014, 11:06:36 PM »
The Canon 70D is said to be one of the few cameras that the Sigma 18-35mm lens focuses accurately on (While using liveview).  However, 18mm is not wide on a crop body.  A  15-85mm lens when stopped down will work well.  The 16-35mm f/4 is also getting good reviews.
There is always a new lens around the corner.  Since Landscape requires a deep depth of field, you should look for different attributes in a lens.  Shooting at f/11, f/16, or even f/22 does not require a expensive lens.  You want to look out for flare issues in a ultra wide, the curved front glass can reach out and grab flare.

Third Party Manufacturers / Re: LuLa likes the Samsung NX1
« on: November 25, 2014, 10:57:46 PM »
I always find it interesting that LuLa falls in love with each new camera model.  They are true Hardware Geeks. 
Their review of the new Pentax MF camera has me wanting one :) 

I agree on everything above...

-  If you buy from Canon, you'll pay $150 or more on sales tax regardless of a discount, so buy from other sellers.
-  Buying early assures you of paying the highest price the lens will probably ever be in its life.
-  $2200 is a lot for the lens.  Just like it was a lot for the 70-200 v2 and 24-70 v2.  (Now look at them.)
-  The Hood does come with the lens.
-  This lens should be a big winner if it follows the track record of the previous v2 lenses released in the last couple years.

And I assume everyone noticed that the zoom and focus rings are reversed on this lens just like they reversed them on the 70-300L.   :-\   Must be the 'new normal' for Canon now.  Dang!  That drives me nuts.  I love holding the 70-200 with the tripod collar on my palm and using one finger to zoom the 70-200 just like butter.   8)

I believe that the reversed control rings is due to the rear focus design.  It improved IQ enough that it was worth having to swap positions.  I doubt if we will see this except for telephoto zooms.  Its also difficult to design for a TC with that moving rear element, but they did it.

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