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Messages - mb66energy

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136
Animal Kingdom / Re: Wrong Photography Ethics?
« on: May 11, 2013, 04:46:28 AM »
Just my 2 ct.

  • Adjusting an image before exposure by using the right focal lenth, position, composition, exposure values, film/sensor, LIGHT is photography.
    Adjusting what the negative/RAW contains to adapt it to what you have seen in a wet/digital darkroom is photography.
    HDR and focus stacking is sth. that recreates what we perceive - by our highly dynamic biological sensors (retina + brain) and adjusting focus by our eyes. So it is too photography.
  • Everything else is no longer photography - in german language I would say "Montage" or composite. And I think it should be referenced as "Composite: Photogs Name" instead of "Photo: Photgs Name"
.
I would count each removal and addition of components to the category "Composite".
[/list]

Both are valuable contributions to art (at least in some cases - I produce a lot of non-art photos for the trash).

To sanj: Thanks for the thread, it was a good starting point to think about what photography is ... or might be.

137
Not enough info so far to give much useful advice beyond what Mt. Spokane offered. but one thing I've learned is never to take off on an important vacation with a brand  new camera.   I have sometimes needed a thousand or more exposures to figure out how to use a new camera body, even with my old lenses.

+1 !

I am just learning to use my 40D right and get the most out of it - I bought it in 2008 ! O.k., I am no professional shooter but I do reflect what I am doing deeply and have some extended knowledge about technical details of photography, electronics, etc. (as every physicist).
For me it is a joy to use an instrument over half a decade or a decade because I learn to master the tool - instead of being masterd by the tool ...

138
EOS Bodies / Re: The Future of EOS M [CR1]
« on: April 27, 2013, 03:16:18 AM »
I think that a compact EOS M with a FF sensor and EF mount would be a very interesting camera. Perhaps the cube shaped design of ancient medium format cameras will help to make it even more compact (not smaller in terms of volume) and help to stow away that  camera easily. I think about a cube of roughly 80 x 80 x 80mm³ which too is compact with the 2.8 40 attached and fits in lens compartments with e.g. a 2.8 16-35 lens.

An EF-M-mount system EOS M with the 2.0 22 might find a way into my hands if it has a EVF and a RAW mode with 10 or 12 MPix.

139
I'd rather see Sigma do a 19mm or 20mm or 21mm wide angle "A" lens. There's nothing available for Canon that's a prime, wide and auto-focus.

Canon's widest is 24mm and if Sigma did a 24mm, they'd just be copying Canon. They should man up and do something new.


Sigma have had a 20mm f/1.8, I guess it wasn't worthy?  Didn't look like it was.


@CarlTN
I took a look at "The Digital Picture" and compared the Sigma 1.8 20 to the Canon 16-35 2.8 ii (at 20mm), both at f/2.8 and with EOS 1Ds mk ii:
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=375&Camera=9&Sample=0&FLI=0&API=2&LensComp=412&CameraComp=9&SampleComp=0&FLIComp=1&APIComp=0
Comparing ISO Charts isn't everything but in this case I think it is a good hint about the IQ of the Sigma. It just doesn't improve too much if you close it furthermore.

@dilbert: That's right, for me a 16 or 17mm f/4.0 with great IQ, small footprint and reasonable price would be very welcome (if it's from Canon or Sigma or ... doesn't matter).

140
EOS Bodies / Re: 21mp Sensor in the 7D Mark II? [CR1]
« on: April 20, 2013, 02:39:50 PM »

[...]

I see several reasons:
  * Programming a firmware which uses two or more CPUs needs a lot of development to parallelize "jobs" on different CPUs
  * PC board layout and thermal management has to be codeveloped/improved
  * If there is a need for a 2nd CPU the hardware is more powerful (120point AF system, 40 MPix sensor) and this will increase the system cost.

A specialized camera will see a lower count of bodies produced so the development cost will be higher on a per-body-perspective.

My 2ct.

You do realize the current 7D Mark I already uses dual DIGIC 4 chips, right? It never cost $2000, let alone $3000. Making use of dual processors in a 7D II would be a no brainer, and would NOT require the creation of DIGIC 6. The 1D X already uses dual DIGIC 5+ chips, and repurposing that design in a cheaper body would be a hell of a lot cheaper for Canon than designing something completely new from scratch. It also proves that the firmware ALREADY supports parallel processing, so there really isn't any extra work there, either.

You are essentially right. There exist four (?) models which use 2 CPUs and the EOS 1D X which uses 3 DIGICs -  some basic development will be there. But never underestimate adaption of existing code for new CPUs with new (totally new?) additional components. And it depends on how you use the CPUs: Sharing load for different tasks is easy, but parallelizing one task is hard to do (except it is sth. like calculating noise reduction for different regions of the sensor).

My third point was perhaps the most important: If there is a need for a 2nd high power CPU the hardware will drive cost - extraordinary fps, a very advanced AF chip, etc. So the additional CPU will only add 100 or 200 EUR/USD but the things that made it necessary are really expensive (high speed mirror mechanism, shutter system, complex and specialized AF chip, ultra fast  FADCs, etc,).

141
EOS Bodies / Re: 21mp Sensor in the 7D Mark II? [CR1]
« on: April 20, 2013, 04:40:55 AM »


I hope for the best about 7D2: new dual DIGIC 6 and new CMOS (NEW Technolgy, NOT the same CMOS as on 1DX, 5D3 edition customized for 7D2).


10x!

No need to be "furious with Canon".  And where did you read a rumor that the 7D2 would get "dual digic 6"?  I must have missed that.  Seems very unlikely to me, unless the price is more in the $3k+ range.  Which would be absurd...a 1.6x crop sensor is a silly compromise in the first place (at least now in 2013).  To attempt to sell one at such a high price, would be a disaster.  1.6x crop, is so very 2002...it's time to move on to something else, something bigger.  I mean, if "reach" is all they care about, they might as well go smaller and make a micro 4/3 size, 3:2 sensor for the 7D2.  But they won't.

Why would "dual digic 6" = $3k+ range? Doesn't the new SX280 with digic 6 come in at $320?

I see several reasons:
  * Programming a firmware which uses two or more CPUs needs a lot of development to parallelize "jobs" on different CPUs
  * PC board layout and thermal management has to be codeveloped/improved
  * If there is a need for a 2nd CPU the hardware is more powerful (120point AF system, 40 MPix sensor) and this will increase the system cost.

A specialized camera will see a lower count of bodies produced so the development cost will be higher on a per-body-perspective.

My 2ct.

142
EOS Bodies - For Video / Re: What's that accessory in the picture?
« on: April 12, 2013, 10:27:34 AM »
My guess: An external monitor with a "tube like extension" to increase the contrast. The boat is too narrow to use the external monitor so the videographer has choosen the camera TFT for framing ... perhaps it's painful for him to find a way to view the camera TFT with the external monitor attached and the baseball cap.

143
Lenses / Re: 2 filters jammed together
« on: April 12, 2013, 08:14:58 AM »
Some mentioned thermal expansion as a solution before, here my experiences of a similar problem I solved last week. I have separated an M42-EOS adaptor from the lens by the following procedure with a CONVENTIONAL cooking plate

                                    WARNING: USE THAT PROCEDURE AT YOUR OWN RISK

1 Heated up A CONVENTIONAL (never with other techniques) cooking plate to roughly 50 degree centigrade and switch it off.
2 Put my combination with the less sensible/smaller part (in your case the UV filter) on the cooking
plate. A sheet of aluminum foil between cooking plate and the filters might help to handle the filters!
3 Waited 30 or 60 seconds - you need the temperature difference, so don't wait too long - until I separated both parts.
4 Perhaps it is necessary to repeat the procedure after waiting long enough to be sure that both parts have room temperature again.

With an INDUCTION, GAS OR RADIATIVE (glass ceramics) cooking plate a cooking pot's base can be heated up to roughly 50 degree centigrade and used instead of a plate itself!

This procedure heats up the aluminum (or brass?) part of the filter selectively and is gentle to the filter glass!

Best - Michael

144
EOS Bodies / Re: Canon Announcements on April 23, 2013? [CR2]
« on: April 08, 2013, 09:44:35 AM »

[...]

Correction: Canon's IQ hasn't changed or improved over the last years for anything besides those moving from the 1D series to the 1DX. Nikon, Sony, Pentax, are all delivering new sensors with better performance.

What is Canon doing?

Nothing. What a joke of a company.

For the last years you are basically right.

In 2005 I testet a Nikon D70 vs. a Canon 350D. Both with a standard lens. 350D produced photos, D70 produced "digitallish image like results". I decided for a 20D which was far superior just to the D200.
These days Canon was way ahead because these digital cameras produced non-digital looking images.

Now the products of both companies show the capability to produce fine images - quality-wise. Nikon has some advantages.

Oh, I forgotten about the topic of this thread ...

Just let us wait what comes and if a product isn't interesting, skip it. My two 40Ds substituted the defect 20D (repaired it now with 1ml Isopropanole to clean the trigger switch), my 600D was added to allow for flexible video (need macro, strong tele for educational short videos (non-art, just functional!)). And I will replace my 40Ds if sensors have 10 to 15MPix real true color capability (meaning 40-60MPixels in bayer patterns).

145
EOS Bodies / Re: Canon Announcements on April 23, 2013? [CR2]
« on: April 08, 2013, 09:32:15 AM »
I likely would never consider getting another high mp body unless it actually delivers enough more when coupled with a lens..

Canon's lenses are already being used to resolve image detail that is higher than the current FF DSLRs: all of the crop sensor DSLRs currently require higher spatial resolution of light from lenses than of the FF DSLRs.

That's not what I observe. With the 2.8 40 or 2.8 24 or the 2.0 100 I have some lenses which are very good in my own experience, several serious reviews (photozone, the-digital-picture, dxomark) and user reports (fred miranda, others).

Using the 40D and the 600D shows no dramatic difference in terms of useful resolutions. Lens flaws are better visible with higher resolution but the sheer IQ isn't much increased.

We all know (or believe?) that the D800 from Nikon (and other newer products with same sensor base tech) have the DR advantage compared to Canon. This is a real advantage. But if you look at DxOmark you will find that the useful resolution between 5D mkii and D800 is comparable despite the fact that there is a 22 : 36 MPixel difference. The same applies to the comparison between 40D and 600D:

2.8 40 & 2.0 100: 40D:    7 from 10 Mpixel    compared to      7D:     9 from 18 MPixel

I think there is no essential difference in IQ (resolution-wise) between 7 or 9 MPixel, a linear scale difference of  roughly 15%.


146
Landscape / Re: San Francisco Sunrise to Yosemite Sunset in a Day
« on: April 08, 2013, 01:07:03 AM »
Wonderful photographs! And it gives me a warm feeling to see those two places again I visited in 1994 - I really enjoyed my 3 weeks in the bay area and Yosemite & Sequoia Nat. Park!

147
Lenses / Re: What shall i get next ?
« on: April 07, 2013, 04:23:49 AM »
Voted for a 100mm macro because (just my opinion as generalist) ...
- if you say product photography: There are so many products which are smaller than the minimum image field of the lenses you own
- 50mm on 5D and 160mm (100mm with APS-C-factor) on the 60D make a nice flexible low light capable couple
- unobtrusiveness combined with medium reach compared to 2.8 70-200 mkii
- general IQ of macro lenses is usually stellar - I have the 2.8 100 USM macro and I am very satisfied with that lens.

Personally I see 100-135mm as "my standard focal length" ...

Best Michael

148
Lenses / Re: Prime vs zoom
« on: April 07, 2013, 04:14:06 AM »
Zooms and primes have a "peaceful coexistence" in my bag.

Usually I prefer primes because they have something I do not see from zooms:
- I think the images are more radiant, a little bit more contrasty especially in contralight situations (there is a difference between 15 or 6 lens groups!)
- with primes I take a lot more care in composition.
That's the reason why I prefer to have two identical bodies: one with the 2.8 40 and the other with the 5.6 400 or (if with zooms) 3.5-4.5 10-22 and 4.0 70-200.

But: Zooms are flexible. I tend to see 135mm (in terms of 35mm equiv) a "normal lens" so the 70-200 is a great walkaround lens with great quality (except contralight).
So I am not shure if it was the right decision to choose the 5.6 400 instead of the 100-400 zoom ...

149
Lenses / Re: New patents for Canon fast primes
« on: April 05, 2013, 04:38:57 AM »
Patents do not guarnatee production.  Sometimes they are done to hold IP.

Shure, but these patents show typical lens designs which penetrate the market since a few years: Standard lenses with a negative front element. This is well known from wide angle lenses for (D)SLRs which use retrofocus designs to give enough space between last lens and image plane.

If I read the patent correctly Canon has decided to use a retrofocus design instead of a double gaussian design to avoid problems with longitudinal CAs: The retrofocus design gives more variability to introduce more lenses/alternative lens geometries to adress longitudinal CA correction without compromising other parameters.

Longitudinal CAs are the main problem with high aperture lenses which aren't easily removed during post processing - I am shure that these patents have a good chance to flow into real products!

Just my 2ct - Best, Michael

150
Site Information / Re: Love or Hate Canon Rumors Forum
« on: April 05, 2013, 04:25:32 AM »
I really like canonrumors because
  * there is a lot of knowledge based opinion (which has much more reliability than simple tech specs)
  * a wide spread attitude to help others if they do some decisions
  * a lot of tech info about existing hardware, software and its combinations
  * some information about upcoming trends

Sometimes I see some "fanatic fights" between persons - but I try to filter the arguments from these debates and if there is nothing left ... what the hell.

If discussions go mad: A good motivation for doing what cameras a lenses are aimed at, taking photos. - Best, Michael

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