No Name Canon EF to u43 Focal Reducer and New APS-C 25mm f/1.4 cctv lens Reviews

samgoldphotos

New to Mu-43
Joined
Nov 19, 2014
Messages
5
Location
Orlando, FL
Real Name
Samuel Dorado
Howdy folks,

I recently acquired a generic focal reducer (same as one discussed here :https://www.mu-43.com/showthread.php?t=68723) and the new APS-C 25mm f/1.4 cctv lens that are floating around eBay. After about a week of use I have posted user reviews to my blog which include sharpness examples with 100% crops. Both are surprisingly good (the focal reducer does not exhibit any annoying flare issues) and you can find more about what I thought of them here:

Focal Reducer:
<a href="https://www.flickr.com/photos/samgold/15780647331" title="Obligatory by Samuel Dorado, on Flickr">
Subscribe to see EXIF info for this image (if available)
"500" height="375" alt="Obligatory"></a>
http://samgoldphotos.blogspot.com/2014/11/user-review-generic-canon-ef-to-m43.html

25mm cctv lens:
<a href="https://www.flickr.com/photos/samgold/15630742197" title="Leading lines by Samuel Dorado, on Flickr">
Subscribe to see EXIF info for this image (if available)
"500" height="375" alt="Leading lines"></a>
http://samgoldphotos.blogspot.com/2014/11/user-review-aps-c-25mm-f14.html
 

Turbofrog

Mu-43 Legend
Joined
Mar 21, 2014
Messages
5,353
Initially I was thinking your review was about combining the two - a cheap 25mm/1.4 to use with the focal reducer! That was going to excite me, but alas I already have a 20mm/1.7 to fill that niche. Nice shots, nonetheless, though! I've also been generally happy with my cheap eBay focal reducer. It definitely lets you get shots you simply wouldn't be able to otherwise.
 

Jüri

Mu-43 Regular
Joined
Dec 14, 2013
Messages
25
Location
Tartu
Real Name
Jüri
I own several Fujian branded CCTV lenses, in fact all the three that I'm aware of. 25mm, 35mm and 50mm. While the the former two are my absolute favourite lenses, the 50mm is a serious dissapointment. According to my observations in terms of DoF and exposure, it's actually f2.8 instead of the designated f1.4, so it's pretty useless.

Thus, as exited as I am to hear about the new 25mm CCTV lens, I'm still a bit cautious. Is the aperture actually f1.4? And am I correct to assume that the FoV on MFT camera would be similar to about a 38mm lens, since it's 25mm on APS-C?
 

samgoldphotos

New to Mu-43
Joined
Nov 19, 2014
Messages
5
Location
Orlando, FL
Real Name
Samuel Dorado
I am not certain about the actual light transmittance but I can try and test this out in the next couple of days. However, I can say that it is pretty hard to manually focus wide open without magnification because the DOF is so shallow. As for its focal length rendering, my understanding is that it depends on what system you mount the lens to. On a micro four thirds camera it renders a 50mm FOV due to the 2x crop factor. It is not 25mm on APS-C, it would be 37.5 - 40mm depending on the 1.5 or 1.6 crop factor.
 

darosk

Mu-43 Top Veteran
Joined
Apr 17, 2013
Messages
706
Location
Kota Kinabalu, Malaysia
Real Name
Daros
I had the older Fujian 25mm - great center sharpness but the vignetting was too much for even me, a fan of lo-fi. Thanks for the heads up, I didn't know this existed - at this price really can't complain, and from the samples it looks to be at least as sharp as the smaller model.
 

samgoldphotos

New to Mu-43
Joined
Nov 19, 2014
Messages
5
Location
Orlando, FL
Real Name
Samuel Dorado
I own several Fujian branded CCTV lenses, in fact all the three that I'm aware of. 25mm, 35mm and 50mm. While the the former two are my absolute favourite lenses, the 50mm is a serious dissapointment. According to my observations in terms of DoF and exposure, it's actually f2.8 instead of the designated f1.4, so it's pretty useless.

According to the link below, it appears that the light transmittance of this lens is not f/1.4 like you suspected. However, I would not classify it as useless... It depends on the application. I found it good for street work because it is sharp with good contrast.

https://www.youtube.com/watch?v=wiuBaAjQ01Y&index=1&list=UU2pwBf0u2GdK4aA5H9pE2Bw
 

Latest posts

Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Mu-43 is a fan site and not associated with Olympus, Panasonic, or other manufacturers mentioned on this site.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2009-2019 Amin Forums, LLC
Top Bottom