Tag Archives: mm

Comparing 33 x 44mm “miniMF” and 24 x 36mm Full Frame Sensors

Comparing Full Frame and miniMF Sensors
Comparing full frame 24mm x 36mm and Fujifilm mini-MF 33.8mm x 43.8mm sensors

Starting a few years ago with cameras like the Pentax 645d and then 645z and continuing with new cameras from Hasselblad and Fujifilm, systems using  the “miniMF” 33mm x 44mm sensors have become more readily available and less expensive.

In preparation for writing something about the merits of the two types of systems I created this image that holds quite a bit of technical comparison data based on pixel counts (e.g. — “megapixels”), sensor size, and ways of comparing them.

For now I won’t try to analyze this too much, except to say that comparisons between the two formats are more complicated than you might think and they are somewhat subjective — it matters how you plan to use them. For example, do you prefer to use the 3:2 aspect ratio of full frame,  or the 4:3 ratio of miniMF, or will you adapt to whichever you are using? This chart shows you how that affects your comparisons.

NOTE: The graphic is a first attempt at including a lot of information in a single chart. It has some problems, especially with the numbers representing crop factor. I’ll update the image to correct the errors before long, and at that point I’ll use it in a more substantive post about comparing the formats.

© Copyright 2016 G Dan Mitchell – all rights reserved.


G Dan Mitchell is a California photographer and visual opportunist. His book, “California’s Fall Color: A Photographer’s Guide to Autumn in the Sierra” is available from Heyday Books and Amazon.
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All media © Copyright G Dan Mitchell and others as indicated. Any use requires advance permission from G Dan Mitchell.

Canon 100-400mm f/4.5-5.6L IS II Lens Announced

(Updated) Canon has announced the long-rumored replacement to the venerable 100-400mm L lens. It is the EF 100-400mm f/4.5-5.6L IS II.

Canon 100-400mm f/4.5-5.6L IS II
Canon 100-400mm f/4.5-5.6L IS II

The lens it replaces has been a very valuable “go to” lens for many photographers who wanted more reach, a reasonably small package, good optical quality, and the flexibility of a zoom. I’ve been an enthusiastic user of the older version for some time now.

Recently Canon has updated or augmented their lens line-up to improve the offerings in certain categories. For example, earlier this year they introduced their ultra wide angle zooms by adding a new EF 16-35mm f/4L IS lens. That lens has been a real success, not only adding image stabilization to lenses in this class for the first time, but also providing excellent resolution across the frame — more so than either of the lenses that many photographers used before it was introduced.

For some time, many have felt that there was a lot of potential for updating the 100-400. Although it is good performer in many ways, there has been room for improvement. More modern IS systems can provide up to 4 stops of stabilization, while the older lens only provides perhaps two. The older lens has good image quality, but it could be better in keeping with more recent lenses from Canon. In fact, rumors about the introduction of the updated 100-400mm zoom have been floating around for years.

We don’t know what the optical performance of the new lens will be yet. As I write this I have seen no real reviews. (I have seen some “reviews” that are mostly lists of specifications and speculation.) When we do see them, it will not surprise me at all if this lens provides valuable improvements in the same way that the 16-35mm f/4 has. Here is some of what we do know from Canon specifications:

  • Rather than the “push-pull” design of the earlier lens, this one has a more familiar rotation ring to change the focal length.
  • As was the case with the older model, the front of the lens extends as you zoom. This means that the lens is more compact when packed.
  • Image stabilization has been updated to provide up to four stops of stabilization — especially important with longer focal length lenses.
  • Other features include 9 blade diaphragm, the familiar 77mm filter thread diameter, and more.

The list price of the lens is $2,199. That may seem like a lot of money, but if it provides the sort of image quality we all expect it is actually a rather good deal for a lens with these capabilities.

Update: I have now had a chance to look at the MTF charts for the new lens (available at the Canon web site) and they suggest that the new zoom should be a very good performer in terms of image quality. The chart suggests better image quality than the existing 100-400 (which is quite decent) and the 400mm f/5.6 prime.

I expect that this lens will be in short supply at first — for the usual reasons related to any new product introduction, but also because of a pent-up interest in the update. The lens has been announced but is not yet available — though you may preorder it if you want to be first to get one.

As for me, there is a very good chance that I will get a copy of this lens before too long. In fact, I’m leaning more and more towards placing a pre-order — something that I rarely do.

© Copyright 2014 G Dan Mitchell – all rights reserved.


G Dan Mitchell is a California photographer and visual opportunist whose subjects include the Pacific coast, redwood forests, central California oak/grasslands, the Sierra Nevada, California deserts, urban landscapes, night photography, and more.
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Text, photographs, and other media are © Copyright G Dan Mitchell (or others when indicated) and are not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

Lens For Sale — Canon EF 24mm f/1.4 L II

UPDATE — November 3, 2014:

Three of the four lenses that I’m selling have now found new homes, but the Canon EF 24mm f/1.4 L II prime is still available.

Canon EF 24mm f/1.4 L IICanon EF 24mm f/1.4 L II – This is the newest version of Canon’s wide-angle, large-aperture 24mm prime lens know for its excellent image quality and performance at large apertures. This lens is in essentially “like new” condition — no scratches or blemishes, as it was purchased for a particular project and only used minimally for that purpose. Lens, caps, hood, pouch, original box. Reduced to $1300.

Canon EF 135mm f/2 L

Canon EF 135mm f/2 L – The Canon 135mm f/2 is classic Canon lens and highly regarded for image quality and its ability to produce narrow depth of field and smooth bokeh.  This lens is in excellent “near mint” condition — no scratches or blemishes. Lens, caps, hood, pouch, original box. $875. – SOLD

Canon EF 85mm f/1.8Canon EF 85mm f/1.8 – This is one of Canon’s best non-L lenses, and many regard it as a worthy (and much less expensive!) alternative to the excellent 85mm L. It is in excellent condition — no scratches or blemishes. Lens, caps, 3rd party hood*, original box. $300. (Canon does not include a hood with this lens.) SOLD

Canon EF 17-40mm f/4 LCanon EF 17-40mm f/4 L – This is a fine workhorse landscape lens, and it is a core lens in the kit of many Canon landscape photographers. The lens is in excellent condition, with some cosmetic blemishes on the lens hood. Lens, caps, hood, original box. $610. –  SOLD

I prefer an in-person sale to someone in the San Francisco Bay Area, but I may consider other arrangements. Email dan@gdanmitchell.com.

G Dan Mitchell is a California photographer and visual opportunist whose subjects include the Pacific coast, redwood forests, central California oak/grasslands, the Sierra Nevada, California deserts, urban landscapes, night photography, and more.
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Text, photographs, and other media are © Copyright G Dan Mitchell (or others when indicated) and are not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

Updated Thoughts on Canon Ultrawide Zoom Lenses

I have updated my blog post: “Canon EF 17-40mm f/4 L Lens.” It might seem a bit strange to update an article on that subject on the heels of Canon’s introduction of a new lens that may be more interesting for many photographers, but read on…

Canon EF 17-40mm f/4 L

For quite a while, photographers shooting Canon full frame systems have basically had two options when it comes to Canon ultra wide zoom lenses, the Canon EF 17-40mm f/4 L and the Canon EF 16-35mm f/2.8L II. (Those using cropped sensor cameras have also had the option of the excellent Canon EF-S 17-55mm f/2.8 IS USM Zoom Lens.) As of mid-2014 there is a new option to consider, the Canon EF 16-35mm f/4 L IS.

I have ordered a copy of the new 16-35mm f/4 lens and I’ll report on that once I have had a chance to use it a bit. But given the altered terrain for those considering the purchase of a Canon ultra wide zoom, I thought that updating the review of the 17-40 was important. This lens is still a viable option for lots of photographers, especially those who are price-sensitive or who want smallest and lightest possible Canon ultra wide zoom for full frame cameras.

G Dan Mitchell is a California photographer and visual opportunist whose subjects include the Pacific coast, redwood forests, central California oak/grasslands, the Sierra Nevada, California deserts, urban landscapes, night photography, and more.
Blog | About | Flickr | Twitter | FacebookGoogle+ | 500px.com | LinkedIn | Email

Text, photographs, and other media are © Copyright G Dan Mitchell (or others when indicated) and are not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.