Showing posts with label Four Thirds. Show all posts
Showing posts with label Four Thirds. Show all posts

Friday, 27 March 2009

Lumix G1 lens adapters

The G1 is now in stores at around 650$ with 14-45 kit lens.

The camera constitutes an interesting attempt to achieve a compact DSLR mainly by doing without a reflex prism, which is replaced by an electronic viewfinder. This results in a shorter pitch between lens and sensor. The bayonet and lenses can be made more compact also. The new format called micro 4/3, is based on the 4/3 standard achieved by mainly by Panasonic and Olympus. Both provide a x2 lens magnification.

The camera is nice and well designed and has been well received by the press and specialized reviewers. The main plus point noted are the good ergonomic, handling, menu navigation, out of camera image quality, etc. Minuses are small captor and consequent limitations in terms of noise, dynamic range etc. battery consumption the inevitably limited performances of the electronic viewfinder. Also pointed were limitations concerning autofocus with other 4/3 lenses via dedicated adapter, auto white balance performances that were addressed in firmware update.

Lack of video capacity is being addressed by new model Lumix GH1, that Panasonic anounced at PMA. The new model is an HD video capable upgrade of the G1 - it should be available at the end of April.

Competition, Pentax/Samsung have also announced their respective version of a compact so-called hybrid DSLR without optical prism along the lines of the Lumix G1, although with bigger APS-C sensor (comparable to DSLR). (see Samsung NX) (Rumors of Pentax hybrid see link)

So the interesting aspect for me is the possibility to have a high resolution camera which is compact enough to carry around all day. The advantage over other compact bridge superzoom cameras such as Canon Sx1 or Nikon P90 is of course the fact the lens can be changed. Now the dedicated lens for micro 4/3 use are limited for the time being. Of course all 4/3 lenses can be mounted via the dedicated 4/3 to micro 4/3 adapter, although compatibility with autofocus operation is not guaranteed for all 4/3 lenses.

In addtion, a number of other manufacturers lenses can be mounted either via the use of an additional adapter ring on top of the DMW-MA1APP adapter.

A number of dedicated third party lens adapter are now (or will soon be) available. A list have been compiled here (not by me). In many cases these adapters vary in cost and quality. No autofocus function is provided. Points to be checked are whether the following functions are ensured: 1. infinity focus, 2. auto metering is available or need to stop down metering, 3. focus confirmation.

In most cases, the camera need to be set in the menu to "shoot without lens". Then focussing is done using the viewfinder like in manual mode where part of the image is zoomed to aid focussing. Metering is possible by adjusting f-stop on the lens and allowing the meter to choose the correct time of exposure. In fact, it's like using stopped down metering although in this case the viewfinder actually brightens the image to allow composition.

In addition, Panasonic may release dedicated adapters for Leica R and M lenses (see link).

The GH1 and micro 4/3 bayonet offer an interesting basis to mount various types of lenses while benefiting from a compact body, high definition sensor, HD video capture (hope it works with adaptor lens) , tilting LCD screen, RAW mode.

Fundamental shortcomings remain the small sensor and the electronic viewfinder. Would rather prefer a range finder even non coupled with lens or even no finder at all if LCD screen is good.

Choice of lenses will also be limited by the x2 multiplying factor imposed by the sensor: you need a 20or 24 mm to reach normal, shooting with wide angles become really inconvenient. Finally, of course you don't get any Exif information.

What is missing is internal (on sensor) image stabilisation and depth of field preview button. Also a grip for the camera would improve the camera handling and possibly battery performance.

Monday, 1 December 2008

LUMIX G1



Ok by now everybody has seen or at least heard about this camera.

It's cool (it comes in red if you want it), compact and delivers good images.

So where is the catch?

No optical view finder - replaced by a electronic one

No prism means no glass - lighter body and less costs

First impressions

Its an improvement compared to bridge cameras but still if you have a nice LCD on the back (which is movable) maybe you don't need at all the viewfinder.

Size - I like the compact camera body and the design, but frankly I hold it with my three fingers (not that I have particularly large hands). In general, I favors using additional battery grips which provide better handling especially with large lenses. For using the G1, I would immediately look for the grip - which btw is not foreseen.

The G1 is aimed at being used with compact lenses, but still despite appearances, the camera is not that compact. Canon G10 is more compact - but it has a built in lens which cannot be replaced, so its not an SLR. But 450D and even its lighter version the 1000D have more resolution has an optical view finder with mirrors and everything (ok don't expect High Point) and sells for less. Pentax KM is also an interesting camera and holds better in the hand.

In fact, probably in this league of cameras, the rangefinder type (such as G10 which is the grand nephew of the Canonet) seems better suited for descreet, available light, quality lens photography. The Lumix is rather based on a video camera design, hence electronic view finder, movable screen, and contrast detection autofocus.

The funny thing is that it does NOT have (yet) video capacity. Panasonic displayed a prototype of an HD capable G1 which will be available in 2009. A full HD version may not be available before 2010. Even then, it will remain to be seen which functionalities the lens will retain when shooting video.


The only "concessions" to SLR design are the use of a mechanical shutter and the use of interchangeable lenses, which with the adoption of the new micro four/thirds format are more compact than ever.

First conclusions

Its a novel design which builds on the bridge cameras legacy of combining features from videocam and SLRs.

The camera seem to deliver, according to various commentators, a good level of image quality which position it above the average compact digital camera and among the medium high level of the most recent consumer DSLRs.

Strong points

Image quality

compactness

Live view and in lens Image Stabilisation

LCD panel is large and moving

More questionable points

Has a lot of videocam genes but... no video

Price - you can get a D60 with double lens kit for the price

New lens (sub?) system

Not that compact compared to G10, 450D or Pentax KM

LUMIX G-1 Lenses

G1 and any other Micro Four Thirds camera can also take any regular size Four Thirds lens through the use of the DMW-MA1APP adapter (see photo enclosed).

However, most of the functionalities of other 4/3 lenses will not work on G1.

Panasonic is not such a big producer of photo lenses, maybe they are even made by others. Therefore I don't know what is the rationale for creating a new range of lenses which is not compatible, given shorter back focus distance, with other cameras using the same bayonet.

However, some nice combinations are possible...



G1 with Leica 25mm lens 4/3 mount + micro 4/3 adapter




Leica R 100mm f2.8 macro Elmarit on G1 with R to 4/3 adapter and micro 4/3 adapter



Panasonic plan to release at least three more lenses in 2009; a 14-140mm f/4-f.5.6 OIS, a 7-14mm f/4 and a 20mm f/1.7 (see prototype on display at Photokina).

The lenses like all 4/3 lenses have a x2 crop factor - so the 20 is a 40mm slightly lower than a normal lens.

Who said pancake?!