yongnuo 35 f2

is this lens terrible? i've been fine with my super old 35mm f2 lens...works fine, sharp enough...but i dropped it, and it won't focus anymore...second time i've done that, and the first time it cost me $120 to fix it...i could try and fix it myself...or i could just grab one of these cheap yognuo ones for less...i plan to mainly use it on my 5Dc, so critical sharpness isn't that important to me really

Define "critical sharpness"?

Spencerphoto wrote in post #18934550
Define "critical sharpness"?

Critical sharpness is defined as the sharpest achievable result from a given combination of lens and camera under the exact same conditions. For example if your lens is the absolute sharpest it will get @ F/8 and you are using it at F/4 your images may be sharp but not critically so. Semantics aside it is abundantly clear the OP is asking whether he can expect results approaching the Canon 35 F/2 with the Yognuo or if it is a dud.

DreDaze - I don't have personal experience with the Yognuo but I did find a direct comparison with the Canon if you already haven't come across it yourself. Hope it helps you out.

https://petapixel.com …nuo-35mm-f2-for-canon-ef/

Spencerphoto wrote in post #18934550
Define "critical sharpness"?

i don't even know...i guess i'm not looking for the sharpest thing around...i'm not expecting L glass quality from something so cheap

Trvlr323 wrote in post #18934710
Critical sharpness is defined as the sharpest achievable result from a given combination of lens and camera under the exact same conditions. For example if your lens is the absolute sharpest it will get @ F/8 and you are using it at F/4 your images may be sharp but not critically so. Semantics aside it is abundantly clear the OP is asking whether he can expect results approaching the Canon 35 F/2 with the Yognuo or if it is a dud.

DreDaze - I don't have personal experience with the Yognuo but I did find a direct comparison with the Canon if you already haven't come across it yourself. Hope it helps you out.

https://petapixel.com …nuo-35mm-f2-for-canon-ef/

thanks

There are 3 threads for this lens in Lens Sample forum. 1 only has a single post. The other 2 have no complaints about lack of sharpness.

Just search Lens Sample forums for "Yongnuo", no need for "35"

Trvlr323 wrote in post #18934710
... Semantics aside it is abundantly clear the OP is asking whether he can expect results approaching the Canon 35 F/2 with the Yognuo or if it is a dud.

That's not how I read it. If the question really was that simple, surely he would have worded it that way?

The OP has since 'clarified' his expectations as "not expecting L glass quality", which doesn't help much.

This is why I asked what HIS definition of "critical sharpness" is, because I assumed it was a turn of phrase rather than a precise, measurable quality.

I don't think I've ever seen anything positive said about any of the YN lenses.

I have a Yongnuo 50mm f1.8 II and I find it very good and only£50. Coincidently, I dropped it the other day and it still works fine. For the price you can't go wrong.

King Kenny wrote in post #18935148
I have a Yongnuo 50mm f1.8 II and I find it very good and only£50. Coincidently, I dropped it the other day and it still works fine. For the price you can't go wrong.

Hosted photo: posted by King Kenny in
./showthread.php?p=189​35148&i=i236547931
forum: Canon Lenses

I understand the price vs performance argument but F/11 isn't much of a challenge.

I got a copy of the latest used Canon 50mm 1.8 STM for 70 bucks, and from a reputable PoTN member. Hard to go wrong.

Edit: forgot this was a 35mm thread, don't meant to hijack

I would rather spend money on the samyang 35 1.4 instead of a lens from yongnuo, even if it is a MF lens. Or find the Canon OE 35mm that yongnuo copied: https://www.mpb.com …3AxgceEAQYBSABE​gLhcPD_BwE

TeamSpeed wrote in post #18935780
I would rather spend money on the samyang 35 1.4 instead of a lens from yongnuo, even if it is a MF lens. Or find the Canon OE 35mm that yongnuo copied: https://www.mpb.com …3AxgceEAQYBSABE​gLhcPD_BwE

thanks, but i have no interest in MF...i'd be using it on my 5dc more than anything, so it's not the easiest body for me to manual focus...i've already got the canon that yongnuo copied, but i dropped it, and it won't focus at all...and i know the repair cost would be more than the yognuo

Just so you aware, the Yongnuo aren't just relabeled Canon lenses. They are actually differently manufactured lenses, there have been teardowns and testing of the 50mm for example, not the same lens, despite they looking very similar on the outside. The outside is a copycat, the inside can be junk. They have copied the 2xIII, 50 1.8, 35 f2, and who knows what else, but they don't work the same or have the same internals.

When I was looking for a 'cheap' 35mm, I looked into the Yognuo but there were not a lot of good things said about it. Seemed like it was a bona-fide $70 lens, not a gem.