April 28, 2011
Posted in reviews

New C-mount wide angle test by Seb Farges

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It’s always interesting to see how C-mount lenses do work on the Panasonic GH2 with 1:1 crop mode. Seb Farges tested three lenses:
This is a movie shot with three lenses, from 6mm to 3.5mm, which is 15mm to 9mm for micro 4/3 sensor (24X36 : 31mm to 18mm). 1st part with the 6mm (more info: vimeo.com/​20766631), some shot with polaroid variable ND filter. Second part, same lens but with a Pixco 0.45X lens converter, found for 16€ on ebay, it’s 40.5mm screw mount filter size lens is perfect for the Pentax. The third part is shot with a new lens I’ve found on Ebay for 46€, a C-mount Rainbow 3.5mm 1.6, perfect for the crop function ! It’s very wide, little fish eye effect, but I have a little focus problem with my copy, so I have to closed the aperture, but not too much because it seems I have problem of intern dirts, that can be viewed in more closed apertures.
I like this 3.5mm Rainbow C-mount lens, it’s fun and very wide. I hope you’ll enjoy the shots.

Links
C-mount Pentax 6mm 1.2 on eBay (Click here).
C-mount Rainbow 3.5mm 1.6 on eBay (Click here).
Pixco wide angle lens converter 0.45X on eBay (Click here).

Thanks Seb Farges!

April 27, 2011
Posted in news

How Panasonic solved the GH2 heating issue (+XZ-2 patent)

FIGS. 8A to 8F are diagrams showing a comparison of the temperature distributions of different heat radiating structures.

If you want to know how Panasonic solved the possible Panasonic GH2 heating issues than you may have a look at the United States Patent 7933516 (Click here to read the full patent at freepatentsonline). That’s the description:
When the camera body is made smaller, however, this reduces the space surrounding the electronic parts, such as an imaging element unit that includes an imaging element and an imaging element circuit board that controls the imaging element, or the main circuit board on which the camera controller is mounted, which means that these electronic parts are packed together more densely. Meanwhile, as image quality rises, the imaging element and the camera controller consume a greater amount of electrical power, so these electrical parts generate more heat. In particular, when a large amount of heat is generated by the imaging element, heat is transferred from the imaging element to electronic parts such as the main circuit board on which the camera controller is mounted, and it is possible that the heat will damage the electronic parts. With the camera controller and imaging element described below, heat damage to electronic parts can be prevented.

The main circuit board is disposed on the opposite side of the imaging element from the body mount, and includes a camera controller. The heat radiating plate is disposed between the imaging element and the main circuit board. With this camera body, even if heat is generated by the imaging element, since the amount of heat transferred from the imaging element to the main circuit board is reduced by the heat radiating plate, an increase in the temperature of the main circuit board can be suppressed. This prevents heat damage to electronic parts.
As shown in FIGS. 8A to 8F, a comparison of the heat radiating structure in this embodiment with the heat radiating structure in the reference example reveals that the temperature of the CMOS image sensor 110 and the main circuit board 142 is lower in this embodiment. The reason for this seems to be that the heat of the CMOS image sensor 110 is efficiently absorbed by the heat radiating plate 195 and the thermal conductor 196, and that heat is efficiently released from the CMOS image sensor 110 via the thermal conductor 196 extending to the front side.
It can also be seen that the temperature of the bottom face 101a of the camera body 100 is lower in this embodiment. The likely reason is that part of the heat transferred from the CMOS image sensor 110 to the main frame 154 is radiated to the outside of the thermal conduction path by the heat radiating member 198.
These results tell us that the heat radiating structure of this embodiment is effective at suppressing an increase in the temperature of the main circuit board 142, and suppressing an increase in the temperature of the bottom face 101a of the camera body 100.”

 

The japanese blog Egami (Clic here) found a patent which describes a possible new Olympus XZ-2 with 28-112mm f/1.8-3.8 lens.

Not a big deal….

April 27, 2011
Posted in news

Vitaliy Kiselev launches the project Lenin and Stalin (+ his own new website)

Image courtesy: http://pampurinet.fatcow.com

The GH1/GH2 hacker Vitaliy Kiselev hasjust launched two new hack projects on his own website (http://www.personal-view.com).
1) Project Lenin:
The goal is to hack all current un-hackable GH1 cameras.
2) Project Stalin:
The goal is to hack the GH2 and to add 25p video recording. But there are also many other features he might could add (60p? 4:2:2 colo space?).

He also started a long discussion (divided in three parts) about the future of the camera world involving Thom Hogan, Mitch Aunger and…me :)
http://www.personal-view.com/talks/discussion/4/looking-ahead.-future-of-camera-world.-part-1.
http://www.personal-view.com/talks/discussion/3/looking-ahead.-future-of-camera-world.-part-2.
http://www.personal-view.com/talks/discussion/2/looking-ahead.-future-of-camera-world.-part-3.

Links to the current GH cameras:
GH1 at Amazon, Adorama, B&H, J&R, eBay. Read or add your user rating on 43rumors (Click here).
GH2 at Amazon, Adorama, B&H, J&R, eBay. Read or add your user rating on 43rumors (Click here).

April 26, 2011
Posted in reviews

New Olympus E-5 review at Biofos (including speculation about the 43 and m43 Apocalypse!)

A few days ago ex Olympus chief Mr. Watanabe reassured that there will be new Four Thirds products coming soon. Today Biofos (Click here) posted a very detailed Olympus E-5 review you might want to read. And he starts with the following (to much pessimistic?) statement “Here we really see history repeating itself. Pen F (half-frame SLR) was launched in February 1963 and ceased in April 1971, a period of 8 years. Pen F was judged to be a commercial failure due to lack of acceptance by film processing manufacturers. FourThirds (quarter-frame DSLR) was released in October 2003 with the E-1 and remains in production with the E-5 today but I suspect the last batch of E-5’s will be made sometime in 2011 – another period of eight years! FourThirds has also been a commercial failure due, basically, to a lack of acceptance by the DSLR buying masses. Whereas Pen F was a derivative of the popular viewfinder Pen series, MicroFourThirds is a derivative of 4/3rds. The original viewfinder Pen cameras remained in production until the mid 80’s with an overall production life of 25 years; let’s hope the m4/3rds machines achieve half of that!

and after the long E-5 testing he writes: “Am I disappointed with the E-5 – in short no but there are things that Olympus could have done better – but we must remember this is the 4/3rds swan song so it is not brimming with technology or a great deal of thought either. I just get the feeling that the Olympus did not want to make the E-5, they did so purely as a sop to E-System users on the cessation of the rest of the system. It follows that not a great deal of enterprise or original thought has been levered into the camera and I suspect most of the technology comes from m4/3rds offerings anyway.

and he doesn’t stop here: “Personally, I think Olympus have lost their way. How can micro-fourthirds be their future when it too is dependent on a non-standard sensor size which still has innate problems with noise and DR. This is the same set of problems that beset 4/3rds. Perhaps Olympus think that m4/3rds users will not be as critical or demanding. Maybe they are right, I hope so. But as all the other manufacturers introduce their own mirrorless versions Olympus and Panasonic will be back to square one. Either that or mirrorless cameras will prove to be a short lived fad and simply disappear. I genuinely fear for the camera divisions future. And that’s a great pity as in 2019 the company celebrates its centenary.

Read the full article at Biofos (Click here) and feel free to discuss his very (provocative?) statements on 43rumors with reasonable and respectful argumentations ok?

Check out the E-5 price, availability and specs at Amazon, Adorama, B&H, J&R, eBay (Click on shop names to visit the E-5 product page).
For your curiosity: Link to the Pen F on eBay (Click here).

April 26, 2011
Posted in news

See how Cosina makes the Voigtländer Nokton 25mm f/0.95 (yes all handmade!)

The video on top shows how the amazing Voigtländer Nokton 25mm f/0.95 gets assembled in the Cosina factory from Nagano (starting from 2:15min). It shows how much handwork is necessary to make that unique lens. The video does also contain an interview with a Cosina engineer. It’s not casual that our readers voted it as lens of the year 2010 (Click here to see the 43rumors poll). Damn, that video makes me even more like my Nokton lens :)

P.S.: As I already told you two days ago it’s almost impossible to find that lens in Stock. BHphoto (Click here) sells it for $815 only but they don’t know when they will receive supply from Japan. On eBay prices are usually higher. The most decent offers do come from a german eBay store (Click here) and a Thai eBay reseller (Click here).

Via Photographyblog

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