Q's Sweet Spot

[Msohio]

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^{I hesitate to ask this for fear of offending my Q, but has anyone done some serious testing to try and determine where the f/1.7 is the sharpest?? I have played around with a tripod in various lighting conditions and have a sense it is at about f/4-5.6.}

 

^{It is great wide open to be sure, but if the light is available I think stopped down it is better. Might event extend to f/8 but after that I think it loses some zip. DOF if clearly not an issue with a 28mm lens, but sharpness remains important.} 

 

^{I'd love to know what you more experienced Leica owners think. This is my first Leica so I have no experience to fall back on. Thanks for your thoughts....Mike}

[screwmount]

^{I hesitate to ask this for fear of offending my Q, but has anyone done some serious testing to try and determine where the f/1.7 is the sharpest?? I have played around with a tripod in various lighting conditions and have a sense it is at about f/4-5.6.}

 

^{It is great wide open to be sure, but if the light is available I think stopped down it is better. Might event extend to f/8 but after that I think it loses some zip. DOF if clearly not an issue with a 28mm lens, but sharpness remains important.} 

 

^{I'd love to know what you more experienced Leica owners think. This is my first Leica so I have no experience to fall back on. Thanks for your thoughts....Mike}

A rule of thumb from the past says: best performance is at 2 stops closed. So it would be around 1:3,4 ...... :-)

[jotloob]

Testing for the sweet point of a lens is mostly the first thing I do with a new lens/camera .

For the LEICA Q I found the sweet point to be at f4/f5,6 .

Unlike most of my MF lenses , which have a discernible fall off below and above the sweet point , the SUMMILUX 1,7/28 of my LEICA Q is has only a very minor fall off below and above the sweet point . I find this remarkable .

[colonel]

Here you go, from Leica's technical data. Looks good:

 

 

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[Msohio]

I guess my eyes are OK, but I feel a lot better with confirmation from those that know the look of Leica images. They really are a look of their own and have led me to alter my Lightroom Nikon preset to have a little more  of Leica's dramatic color snap.

[Stuart Richardson]

sorry, wrong thread

Edited September 23, 2024 by Stuart Richardson