Showing posts with label zone focus. Show all posts
Showing posts with label zone focus. Show all posts

Monday, December 10, 2012

A Deeper Look at the New Olympus 17mm f1.8 Micro 4/3 Lens

Ming Thein (blog.mingthein.com) has done a very nice write-up on the new Olympus 17mm f1.8 lens. I covered the announcement of this exciting new lens a few days ago.
 
Unfortunately, Ming copyright protects all of his images, so rather than using one of his excellent images, I grabbed this one (also nice) from photoxels.com:
 
Shot With Olympus 17mm f1.8 Lens
Image Source: http://www.photoxels.com/photography/wp-content/uploads/2012/11/olympus-m-zuiko-17mm-f1.8-low-light-photo-pa170026_Art.jpg
 
Ming compares the new lens to two existing ones: the Olympus 17mm f2.8 and the Panasonic Lumix 20mm f1.7. I have the 20mm f1.7, and it's an amazing little lens. However, Ming's article brings out one very important feature of the new Olympus lens that really has me interested - a real depth of field scale! More on that later.
 
Ming says that the Olympus 17mm f1.8 is built similarly to the new Olympus 75mm f1.8, that is, it's one of their premium lenses, with no plastic construction. I can say that the 75mm is built very nicely, and feels great in the hand. Ming also says the expensive Olympus accessory hood is poorly designed, and makes it hard to remove the lens cap.
 
Focus is reportedly "very, very fast," even when compared to the Lumix 20mm lens. I have never felt that the 20mm is slow to focus, but I have read it in other places. Focus speed is not enough to interest me in the new lens
 
The new Olympus lens focuses to a minimum of 25 cm.
 
Ming reports that the field of view difference between the Lumix 20mm and Olympus 17mm f1.8 is nearly negligible; from that standpoint it makes me think that it's not worth adding the Olympus lens to my kit.
 
However, as I mentioned above, the fact that the 17mm has a depth of field scale may change all that. You see, none of my Micro 4/3 lenses have any type of focus scale or depth of field indicator on the lens body. Importantly, you also cannot trust the scale on lenses adapted to Micro 4/3 from other mounts; they are usually not correct. This means that doing zone focus manually (where I use a set f-stop and manual focus to allow for very quick shooting on the street) is impossible, other than a trick for setting hyperfocal distance. This is a major drawback, as I love to use a small aperture (usually f8), and manually focus to get a very large range of distances in focus. I also like to use the depth of field scale to tell me how far away the minimum point of clear focus will be. With my Leica, for example, I can look down and tell myself mentally "anything beyond 8 feet is mine." This new Olympus lens will make that possible on a Micro 4/3 body. Therefore, I've got to give this lens a try.
 
The new lens is reportedly going to be priced at around $500, and should be available in the US in December.
 
(Click Here) to read Ming's full review.
 
DMC-365.blogspot.com
 
The new Oly lens is not yet on Amazon. Here's a link to the very nice Lumix 20mm f1.7:
 
 

Monday, June 18, 2012

Shooting Rangefinder-Style With Micro 4/3

 
kdixey's RF Shooting Emulation
dixeyk's Emulation of Rangefinder Style Shooting on Panasonic Lumix DMC-GF2
Image Source: http://www.mu-43.com/f35/how-approximate-my-old-compact-rfs-27412/

dixeyk has written a post over on mu-43.com about recapturing the shooting style of classic rangefinder cameras with Micro 4/3 gear.

(Click Here) to read the full post.

I have referenced dixeyk's posts before. We seem to have similar interests in our photography. The goal was to set up a modern Micro 4/3 camera to allow a shooting style similar to a classic film rangefinder. Of course, the best way to get that is to have a digital Leica (or perhaps the Fuji XPro 1?), but that was not available.

The characteristics that dixeyk went for, as far as I can interpret, were a compact kit, fast (wide aperture) lenses, and fast focus (as one can achieve through manual focus on a rangefinder camera). For this, he chose to use a Panasonic Lumix DMC-GF2 and the Lumix 20mm f1.7 as his normal lens. He also used Lumix 14mm f2.5 and Olympus 45mm f1.8 lenses, approximating a 28, 40, and 90mm field of view on a classic rangefinder. So far, I would have made similar choices, using my Lumix DMC-GF1 (another Lumix body without an internal viewfinder) and Lumix 20mm f1.7 lens.

Now here's where we go different ways. In dixeyk's case, he decided to shoot with the LCD and autofocus, utilizing the camera's ability to touch focus and shoot. This allows the user to pinpoint where in the field of view they want to focus by touching the LCD screen. As soon as focus is achieved, the camera automatically releases the shutter, capturing the image. I can see how this would feel similar to the fast focus and capture capability of a classic rangefinder.

For my own approach, especially in street photography, my favorite use of a rangefinder, I go in a completely different direction. I turn off the LCD, mount a 35mm optical finder (an old Russian version in my case) in the camera's flash shoe, and use hyperfocal settings to give a lot of depth of field. For information on that,

(Click Here) to see my previous post on setting hyperfocal distance on Panasonic Micro 4/3 cameras.

I find that the 35mm finder closely approximates the field of view of the 20mm f1.7 Lumix lens.
 
I use the exact same finder on my smaller Panasonic Lumix DMC-LX5, which provides for directly setting zone focus in the manual focusing screen. In actuality, the LX5 does a better job of emulating a rangefinder than the GF1, in my opinion. It has a great scale to show the focus distance and depth of field, will allow you to lock the zoom at any focal length and the f-stop at any setting. It is a super-quick little camera for street photography.
 
(Click Here) to see my post on my LX5 street kit.
 
I will give dixeyk's approach a try. I think the main differences are in what each of us is trying to achieve. He's working toward quick response pinpoint focus and capture, while I'm working toward large depth of field, quick response street photography with a rangefinder camera.
 
Fun stuff.
 
DMC-365.blogspot.com