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Messages - Mt Spokane Photography

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4306
Lenses / Re: I want a 135mm 1.8 IS L
« on: January 16, 2013, 05:50:00 PM »
Sounds fantastic, but the 135mmL is not exactly a big seller, so don't expect it.  I'm planning to use my 135L for 500 or more theatre photos tonight, its my most used lens, so I'm one of those who would be in line to buy one..

4307
Site Information / Re: Problem with the Canonrumors Website
« on: January 16, 2013, 05:46:09 PM »
I have seen that happen with other web sites, (not CR).   It ruened out to be a problem with other software I had just installed.  I removed the software and the problem went away.

4309
Lenses / Re: Question about variable aperture
« on: January 16, 2013, 02:16:13 PM »
Not afraid to ask stupid questions as it's the best way to learn and normally people on this forum will give informed answers.

My question is around variable aperture in lenses. Why do lenses with variable as opposed to fixed aperture cost less? Is it a mechanicel explanation to it? I can see that more advanced optics will cost more with more glass going into the lens, but don't understand the dynamics behind aperture.

I'm in the IT business and have been for many years, hardware related features sometimes costs more to develop and produce and somteimes it is simply down to charging more for better functionality - higher margins from customers prepared to pay premium for higher performance.

I would be happy to understand more about this.

thanks in advance
J
Its a simple mechanical explanation, the lens glass much be much larger at the long end of the zoom if you want a larger aperture, and that costs a lot more.
Consider the 100-400mm  f/4.5-f/5.6 L Zoom.  At 400mm, its f/5.6.  Now price the 400mm f/4 lens, its $6,000, and a lot of that is due to its much larger diameter of the lenses.  A zoom would be about $11,000 as the much awaited 200-400mm f/4L is expected to cost.
The diameter of a lens element drives up pricing because its so much harder to make to the extreme accuracy required.

4310
Third Party Manufacturers / Re: 18 Stops of Dynamic Range - RED Dragon
« on: January 16, 2013, 02:03:09 PM »
It sounds exiting, but, if I had a quarter for every promise they made that turned out wrong, I'd be rich.  They seem to make statements based on hope.

4311
Canon General / Re: refurbished Canon 5d mk iii
« on: January 16, 2013, 12:02:28 PM »
I purchased a used 5DII in the past year. My considerations were (1) is it at or below below market price (2) excellent condition (3) low actuations (4) 100% positive feedback on Ebay. Nice to haves were original packaging and receipt. I would not have had an issue purchasing a refurb body if the considerations were met. I have purchase refub lenses and P&S and have had no issues at all.

Did the 5Dii have a pin hole in the serial number plate on the bottom of the camera?  Just curious, it sounds like this is something new by Canon and if so, wondering why they decided to do it?


Thanks for the tip!!
Canon started marking the serial number of refurbs about 1-1/2 year ago, but not all the refurb stuff I've bought has a defaced serial number.  I suspect that they are more diligent about marking new products like the 5D MK III which only came out last spring, and would still be covered by warranty at least until may or so for those with no bill of sale.

4312
Canon General / Re: Why buy from a bricks and mortar store?
« on: January 16, 2013, 11:56:59 AM »
I've bought cameras from a small local store.  The owner and all those that work there are photographers, they give good advice and know their products.  The equipment they sell is good quality and not junk just sold because it has a high markup.
Sadly, they will likely not last too much longer.  We also have a much larger local camera store that has been around for over 100 years.  They have a huge internet presense as well as two brick and mortar stores.  They have survived by branching out into high end home theatre and headphones / etc for those who want to hear the sound before plunking down a few hundred on a headset.
The store has lost its pro photographer sales people, and gone to less experienced photographers, so you need to know about a product before you buy it.  The staff does at least have a reasonable knowledge of what the products they sell can do, and don't register a blank look when you ask then a tough question.
I think we are quite lucky to have both of them.  Yes, some products I buy are only available at Adorama or B&H, so they get business from me as well.

4313
Lenses / Re: Is anyone using Nikon 14-24 on 5D3? Set up?
« on: January 15, 2013, 12:03:31 AM »
Its a pretty specialized lens, and not for general use.  It is extremely susceptable to flare, and can grab stray light where you would swear it did not exist.
If you are able to take the time to wait for the right lighting conditions to avoid flare, its a super lens.  If you are impatient, you might be frustrated.
Using a fully manual setup pretty much requires a lot of patience, and trial / error exposure.

4314
I've had the 300mm f/4, the 100-400mmL and the 400 f/5.6 L.  All are fine lenses, but I kept the 100-400mmL.  Sharpness at 400mm is pretty much identical between the 400mm and the zoom.  The 300 plus TC was not up to matching the native lenses.  This has been confirmed over and over, with the occasional user seeing it different, likely due to a bad sample.
The big advantage of the 100-400L and the 300mmL is their much greater magnification.  If you are photographing small birds like humming birds, you need a close focusing lens. 
If you are photographing birds in flight at a long distance, thats where the 400mm f/5.6 shines.

4315
As Neuro noted, there is only one type of better beamer, but different part numbers fit different flashes.  The flash may scare shy birds, but you get the image first.
It doesn't matter 7D or 5D, lighting will help.
This is a image taken with a 1D MK III, 100-400mm L at 400mm with a better beamer.  I had a comparison image without the flash, but its lost. There were some nasty shadows that made the image awful without the light.

 
 

4316
EOS Bodies / Re: Error 80 - 5D Mark III
« on: January 14, 2013, 10:56:49 AM »
Use the camera with only the CF card, and then with only the SD card installed to see if  you can pin it down.
Be sure to do a low level format or erase of the SD card.  If the problem is card write speed, a low level format will greatly speed up the SD card until it fills up with used sectors, and then it will be slow again, since it must first erase a block before writing to it. A low level format will also fix any card errors, a regular format will not fix errors.

4317
EOS Bodies - For Stills / Re: Reikan FoCal Pro with 40 STM
« on: January 13, 2013, 10:47:53 PM »
I just purchased Reikan FoCal, and now I'm like all confused

I ran 3 test with my 1dX and 50 F1.2 and I got : 7, 10 and 9...and when I then take random pictures I seem to get better focus with 0 value!!!

i'll have to see what is not normal.


1- Where do you enter the value of the value - on the chart sheet? In my case I put in the Large Target width (in the preferences pane)
2- The distance is like 2.2 meters
3- My ev is lower than wished but still is within specs.

anyhow...not as quick win as I thought... I just seem to get soft focus with my 50 at 1.2....but now that my 0AF adjustment value...just puts lots of confusion in my head :-)
It is really important to have stability and accurate alignment to the target as well, so be sure to use the target alignment feature.
If you are not getting consistent results, more light can help, EV 8 is the minimum recommended, but I get much better results with more light, like EV 11, 12 or 13.
To get the information about the results, click the save report button (pro version).  Then the information, sharpness numbers, light levels, etc will be in the report.
If you want more accurate and repeatable results, you will need to change the settings to set a tighter repeatability tolerance and more test points.  I find that the target width of 123mm matches the width of the target I print.
I haven't played with the latest version, since all my lenses are tested and accurate, but I might try some of the new features on my Windows 8 box to see how well they compare.
I find that it is visually difficult for me to determine exactly which setting is best.  However, you can save the images that are taken (set the option) and then view them in the report to see if you can see any difference between the AFMA values close to the recommended value.  You can also compare the "0" AFMA image with the recommended AFMA image.
 
Good luck, and add as much light as possible. That allows higher shutter speeds which means less vibration effects.  A 1/500 shutter speed for a 85mm lens gives much better results than 1/15 sec.

4318
EOS Bodies / Re: EOS not good for NASA?
« on: January 13, 2013, 08:06:27 PM »
Purchase of commercial-off-the-shelf items is rarely purchased through competitive bids. 
Most likely someone in NASA determined that, for whatever reason, Nikon more closely met the technical requirements for NASA's mission.  So it would just be matter of going to the catalog and making the buy.
If you have ever qualified items for use in space, as I have,  you will find that they must be tested thouroughly and then receive a formal approval.  They then receive a separate part number due to the fact that there will be something modified.  This takes them outside the realm of off the shelf items.  They have to withstand the vibration, shock, temperatures, and a host of other things.  The biggest issue is that equipment often gets worn out from the testing.
I would expect that a different lubricant will be used that can take the temperatures and vacuum without outgassing.  Silicones outgass, and the vapor then redeposites itself in some very nasty areas like on mirrors and the glass in lenses.
 
Here is a old article, but the idea hasen't changed.
http://www.popphoto.com/gear/2011/07/how-does-nasa-get-nikon-d2xs-ready-to-go-to-space

4319
Canon General / Re: refurbished Canon 5d mk iii
« on: January 13, 2013, 07:25:42 PM »
I've sold a refurb 7D and a refurb 5D MK II.  The sales price was about the same.  The number of actuations and the condition of the camera are a buyers first concern.  A refurb camera is not salvage.  Most of them were demos or new returns, and have very low actuations.  Check the actuations on your camera, its likely under 1K.
Salvage cars are ones that have been totalled, from a accident or even a flood, and have a high likelyhood of having serious problems as opposed to a ordinary used car.

4320
I am having connection/tethering issues. Tried tethering my 5D Mark 3 to Lightroom 3. Did not work. Camera shows "Busy" message and the camera wont work. tried tethering my camera to EOS Utility 2.11.1 for remote shooting. Will not work. EOS Utility quits when my 5D Mark 3 is connected via USB. My Canon 5D Mark 3 firmware 1.1.3. I am on Mac OS 10.8.2.
Any help, any advise will be greatly appreciated. Thank You!
The 5D MK III is not supported by Lightroom 3 and never will be.  Update EOS Utility to the latest, you are way out of date with 2.11.  That should fix that issue.

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