3dwag
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Veteran Member
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Posts: 4,674
O 17mm f/1.8 vs PL 15mm f/1.7
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sellera wrote:
leendertcv wrote:
Primes to consider:
- Panasonic Leica 15mm f1.7: Wonderfull small lens
- m.Zuiko 25mm f1.7: Very good standard lens.
- Panasonic 42.5mm f1.7: Very good portrait lens and good for closeups of flowers etc.
- m.Zuiko 60mm f2.8 macro: Very good macro lens.
I wish I could bring'em all with me to Brazil, but I'm afraid I'll have to chose only one
Right now, I'm torn between P15 and O17!
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!
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.
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. 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.
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.
Cheers
Dennis