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sellera
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Regular Member
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Posts: 187
Re: O 17mm f/1.8 vs PL 15mm f/1.7
3dwag wrote:
My walk around prime kit is the Olympus 17mm f/1.8 on EM5ii and the 60mm f/2.8 macro. I find my 17mm's center to corner sharpness and overall IQ to be very fine. Not quite as sharp as the 60mm, but these are two very different lenses and I really like my 17mm. One thing I haven't seen mentioned here is the 17mm's manual focus ring and depth of field scale - just like on my 12-40mm and 7-14mm f/2.8 Pro zoom lenses!
That's quite a nice setup, mate. During daylight, I'll probably go with the 12-40 and the 75-300, if needed. But for quick street shooting, I'm planning to go only with the 17!
Before I get into your specific 17mm vs 15mm lens choice dilemma, some background information might be helpful. In my 135 full-frame film days, when photographing for travel and pleasure I carried two Pentax Spotmatic II bodies, one with a 35mm f/2, the other with an 85mm f/1.8, and in my pocket a 21mm f/4 (I may be a little off on that last focal length and aperture, was it 21.5mm and f/4.5?). The 35mm was my most-used lens, so I have a deep connection there. 28mm was too wide for me (and not wide enough for some "special" shots), and especially in closer-ups with people the 28mm had too much rectilinear projection distortion towards the edges of the frame. Also of note, I rarely needed the extra aperture for shallower depth of field on both the 35mm and 85mm, but mostly shooting Kodachrome 64 I needed the lens speed, though was always wanting a deeper depth of field.
Now, the PL 15mm is still too wide for me, but it depends on your own preferences and subjects, so you may prefer it to the 17mm.
No, no, you're right -- I'll go with the 17mm, that's what I'm used to!
However, there is one more thing to consider, and that is how you intend to use your photos, including what aspect ratio you tend to work in, since the "equivalent field of view" when comparing μ4/3 to 135 full-frame format is always calculated on the diagonal field of view, whereas the horizontal (or vertical) angle might be the more important to you.
I realize that this may be "splitting hairs", but this may help you to make your decision.
It's never 'splitting hairs', I'm just like you, too! Every explanation is a valid one!
When I shot film on my Pentax Spotmatics, in 95% of my photos I was thinking in aspect ratios closer to the 4:3 ratio (same as μ4/3!), not the native 3:2, because I was printing 8x10 and 11x14 inch prints of my best. So, I generally cropped the sides of a landscape orientation print for my final image, making the effective diagonal field of view angle slightly smaller than the calculated lens native angle. So, already for me today on μ4/3 the 17mm may be just a bit wider angle than my film 35mm, and the 15mm is just too wide.
On the other hand, if you tend towards the 3:2 aspect ratio, for μ4/3 you will have to crop the vertical, so the effective diagonal angle will be slightly smaller, and this may push you towards the PL 15mm.
When shooting with wider lenses, I'd like to go with a 16:9 aspect ratio, so I can use the final result as a slideshow on my OLED TV. I'll crop top and bottom to fit the screen.
When shooting normal, I'll just go with the normal aspect ratio of 3:2.
I tend to print little to none, mate, so I don't think the composition will matter that much, just the upper and bottom crops.
To help visualize this, the following screenshots from my iPhone compare the 17mm of μ4/3 to the 35mm of FF, with equivalent diagonal, vertical, and horizontal imaging angles used for crop factors and showing imaging area overlays:
Diagonal field of view comparison.
Vertical field of view comparison.
Horizontal field of view comparison.
I hope this helps.
Wow, crystal help. Thank you, mate! By the way, is it an app?
LS
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