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Wide, Ultra Wide, and Fish Eye

Hello all! Despite the long period of inactivity, this blog is still active. I've just been a bit busy.

But back to this post. Today I'll be talking about a trip I made up to London for an evening shoot at St. Paul's cathedral.
I knew before traveling that I'd need an ultra wide angle lens to do the architecture any sort of justice. I've owned the Olympus M.Zuiko 9-18mm lens for many years (checks LR metadata - April 2012!), and it is a compact and light UWA whose performance isn't too shabby.
Saying that, I've definitely noticed a diminishing in its capabilities over the years - whether this is down to use or something else, I cannot say. I'm simply not happy with the sharpness of the corners from it anymore.

I've looked into replacing the M.Zuiko previously. I can't really justify the ~£1000 GBP price-tag of the Olympus f/2.8 7-14mm, nor the similar price for the Panasonic Leica 8-18mm, as I rarely shoot UWA these days. I shoot manual lenses quite a bit, so the Laowa f/2 7.5mm is definitely an option for me, yet I didn't have the time to acquire one before I was due to head up to London. And so I got hold of a Samyang 7.5mm fisheye.

Why a fisheye? That is a good question. I've never been over-enthralled by the high level of distortion that a fisheye lens gives - I'd much rather have a low-distortion rectilinear ultrawide angle. Having read up on "de-fishing" a fisheye in post, I thought I'd give it a go. And if I wasn't happy with the lens, I could always return it.

Upon entering the cathedral, I was blown away by the scale and the beauty of the architecture. If you've never visited St. Paul's before, add it to your list - it is simply beautiful in there.
I used three lenses while I was inside the building that gave me a good range of focal lengths for a variety of applications:
  • Samyang f/3.5 7.5mm fisheye
  • Olympus M.Zuiko 9-18mm
  • Voigtlander f/0.95 17.5mm
Initially, I tried to shoot a composition with both the fisheye and UWA to get a feel for just how much wider and distorted the Samyang would be. I instantly found that the shots taken with the Samyang jumped out at me more than the Olympus ones did. Yes, there was quite a bit of distortion, particularly if one moved the lens up or down from the horizon. But this could be used in quite an interesting manner to enhance or accentuate compositions.
Here's a side-by-side look of the field of view offered by first the Samyang, and then the Olympus UWA:

As you can see, you get substantially more within the frame with the fisheye. And I was surprised how natural the resultant image actually looked. In comparison, it makes the M.Zuiko ultra-wide image look like it was shot with a 35mm lens!

I was very happy with how the Samyang performed, and ultimately didn't "defish" any of the images I processed from the lens. Here's how another shot looked with and without distortions corrected:

This was achieved by selecting the relevant Samyang lens Profile Correction in Lightroom. While I think it works for sharing on the web, the act of stretching and squeezing the image does result in a major loss in sharpness in the corners. This could be alleviated a bit by cropping the image, but then you start to lose that extra wideness you bought the lens for in the first place.

I also got some great images using the Voigtlander (first image in post is one of my favourites from the evening), though did suffer a bit from some of the lens' peculiarities - I don't believe my second-hand copy of the lens is the best example of the glass, as I feel it suffers from some odd distortion at certain apertures. I'll need to do some tests to ascertain exactly what is happening and at what apertures, as I had quite a few shots which were almost-great were it not for some field-curvature.

The starbursts allowed by the lens, not just the fast aperture really bought some great atmosphere to the building, and I was glad I had something a little longer than all those silly-wide lenses. I think this vertical panorama works quite nicely without too much distortion:

Anyway, I'll be keeping the fisheye. It served its purpose and more - I was very surprised by just how sharp it was at the centre. Though it isn't a lens I would use in many circumstances, thanks to the size, weight and performance of the lens, it can easily be thrown in the camera bag for those rare occurrences when a change in perspective is welcome.

My Flickr album of the St. Paul's shoot is here.

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