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<blockquote data-quote="Jon Rowlison" data-source="post: 434443" data-attributes="member: 32211">I love my 50mm f/1.4.. The 1.8 was about half as much, but a $300 vs $500 full-frame &quot;up buy&quot; is something I'd do any day for the two extra stops. It gets harder to justify (for me) when you start looking at a $500, $1500, $5000 difference.I imagine I'd really love the 1.2 but I'd miss the auto-focus. I'm lazy that way... Unless money is really tight, you won't be upset withe the 1.4. As others have mentioned, every lens has its own characteristics, but the optical quality of a 1.4 is likely going to be better than a 1.8 if they're from the same manufacturer.Also note that the aperture marking (f/1.4) is the most open aperture the lens will support. You can always stop down from an an f/1.4 (like, to f/1.8) but you can't stop an f/1.8 up to f/1.4&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /></blockquote>

[QUOTE="Jon Rowlison, post: 434443, member: 32211"] I love my 50mm f/1.4.. The 1.8 was about half as much, but a $300 vs $500 full-frame "up buy" is something I'd do any day for the two extra stops. It gets harder to justify (for me) when you start looking at a $500, $1500, $5000 difference. I imagine I'd really love the 1.2 but I'd miss the auto-focus. I'm lazy that way... Unless money is really tight, you won't be upset withe the 1.4. As others have mentioned, every lens has its own characteristics, but the optical quality of a 1.4 is likely going to be better than a 1.8 if they're from the same manufacturer. Also note that the aperture marking (f/1.4) is the most open aperture the lens will support. You can always stop down from an an f/1.4 (like, to f/1.8) but you can't stop an f/1.8 up to f/1.4 :) [/QUOTE]

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