eleveninth
Senior Member
ok la 13 days not bad already coming from that area. sometimes 2 - 3 months then i receive my stuff.
Zhongyi Lens Turbo Adapter M42-FX available!!!
- Thread starter ahblack
- Start date
ok la 13 days not bad already coming from that area. sometimes 2 - 3 months then i receive my stuff.
ahblack
Senior Member
I dont think I nailed the focus yet, and it was glowy under the light in my room. Have to take it out to do a proper shooting.
ahblack
Senior Member
Wow that's crazy =.= Wait until dry hahaha
eleveninth
Senior Member
I've ordered liao
ahblack
Senior Member
Wow really BBBMTL LOL which mount you ordered?
eleveninth
Senior Member
M42 lor.
ahblack
Senior Member
What lens are you going to use with it? Share some shots too when you get it!!!
eleveninth
Senior Member
ahblack
Senior Member
But what's the difference between that and lensbaby? I'm totally noob in tilt-shift lens...
eleveninth
Senior Member
But what's the difference between that and lensbaby? I'm totally noob in tilt-shift lens...
lensbaby and t/s very different eh
ahblack
Senior Member
hmm... gonna look deeper into it
ahblack
Senior Member
Uncropped Helios!!!
Swirling swirly swirl by ah.b|ack's s6nse, on Flickr
Swirling swirly swirl by ah.b|ack's s6nse, on Flickr
Swirling swirly swirl by ah.b|ack's s6nse, on Flickr
Swirling swirly swirl by ah.b|ack's s6nse, on Flickr
ahblack
Senior Member
Well, did more shots on last weekend, the Helios does really well! I still need more time to nail the focus though...
Small park by ah.b|ack's s6nse, on Flickr
This one is pretty sharp!
As for the rest... Need more practice hehehe
Small park by ah.b|ack's s6nse, on Flickr
Small park by ah.b|ack's s6nse, on Flickr
Small park by ah.b|ack's s6nse, on Flickr
This one is pretty sharp!
As for the rest... Need more practice hehehe
Small park by ah.b|ack's s6nse, on Flickr
Small park by ah.b|ack's s6nse, on Flickr
ahblack
Senior Member
hmm... I'm not sure how to put this... I will try my best...
Basically, the function of the lens turbo is to "shrink/focus" the light/image of a Full Frame lens onto APS-C sensor.
As for focal length, since all the value on lenses are based on 35mm sensor, you simply do not need to factor the 1.5/1.6x due to APS-C sensor (what you normally do, XF 35mm will become 50mm on APS-C sensor).
So in the end, you will get a true (roughly) 135mm in APS-C if you mount a 135mm lens on your Fuji-X cameras. In my case, the Helios 44-2 58mm f2, will be 58mm (roughly) on my X-T1.
For F-stop calculation, it kinda gives extra stops of light (does not affect Depth of Field, technically...) My f2 Helios get at least 2 stops of light, so maybe F1.4? From the official website, they only mentioned gaining 1 stop of light, but from what I see, definitely more than 1 stop.
Hope this make sense to you hahaha... not the best explanation...
Basically, the function of the lens turbo is to "shrink/focus" the light/image of a Full Frame lens onto APS-C sensor.
As for focal length, since all the value on lenses are based on 35mm sensor, you simply do not need to factor the 1.5/1.6x due to APS-C sensor (what you normally do, XF 35mm will become 50mm on APS-C sensor).
So in the end, you will get a true (roughly) 135mm in APS-C if you mount a 135mm lens on your Fuji-X cameras. In my case, the Helios 44-2 58mm f2, will be 58mm (roughly) on my X-T1.
For F-stop calculation, it kinda gives extra stops of light (does not affect Depth of Field, technically...) My f2 Helios get at least 2 stops of light, so maybe F1.4? From the official website, they only mentioned gaining 1 stop of light, but from what I see, definitely more than 1 stop.
Hope this make sense to you hahaha... not the best explanation...
Last edited:
ricleo
Senior Member
hmmm i thought the lens turbo or speedbooster shld give greater DOF control, or approximate FF DOF. below extract is from the metabones page. the lens turbo is a clone of speedbooster effectively.
http://www.metabones.com/article/of/faq
How does Speed Booster® affect the depth-of-field?
The short answer is Speed Booster® gives essentially the same depth-of-field effect as if a full-frame camera body were used.
The long answer is complicated. If we are referring to depth-of-field in the mathematical sense, that depends on the aperture, magnification and circle of confusion (CoC). Magnification in turn depends on distance and focal length. The 50mm lens now becomes a 35mm lens which behaves very differently in terms of perspective. The question is, do we still keep the distance the same? Should the CoC be kept the same? There are many missing variables we need to choose and fill-in before we could get a meaningful answer. When people claim Speed Booster® does not change the depth-of-field, they usually neglect to state the implicit assumption that the distance is kept the same (thereby changing the object size) and the CoC is kept the same. The same logic would lead to the conclusion that an APS-C camera has the same depth-of-field as a full-frame camera, too, which under the same implicit assumptions is mathematically true (the depth-of-field formula is format-size-agnostic, after all), but with which many people would disagree from practical experience.
However, when most people ask about depth-of-field, they are not interested in mathematics, but rather, they are after a certain kind of shallow depth-of-field "look". If this is the case, the short answer above applies.
http://www.metabones.com/article/of/faq
How does Speed Booster® affect the depth-of-field?
The short answer is Speed Booster® gives essentially the same depth-of-field effect as if a full-frame camera body were used.
The long answer is complicated. If we are referring to depth-of-field in the mathematical sense, that depends on the aperture, magnification and circle of confusion (CoC). Magnification in turn depends on distance and focal length. The 50mm lens now becomes a 35mm lens which behaves very differently in terms of perspective. The question is, do we still keep the distance the same? Should the CoC be kept the same? There are many missing variables we need to choose and fill-in before we could get a meaningful answer. When people claim Speed Booster® does not change the depth-of-field, they usually neglect to state the implicit assumption that the distance is kept the same (thereby changing the object size) and the CoC is kept the same. The same logic would lead to the conclusion that an APS-C camera has the same depth-of-field as a full-frame camera, too, which under the same implicit assumptions is mathematically true (the depth-of-field formula is format-size-agnostic, after all), but with which many people would disagree from practical experience.
However, when most people ask about depth-of-field, they are not interested in mathematics, but rather, they are after a certain kind of shallow depth-of-field "look". If this is the case, the short answer above applies.
ahblack
Senior Member
There's a better explanation hahaha!
If you talk about this from the APS-C sensor viewpoint, yes it does give greater DOF due to the "shrinking" effect. But if you compare a A7 + 50mm f1.4 with X-T1 + 50mm f1.4 + Lens Turbo, I think the difference of DOF is negligible/minor (unless you want to go FULL FORCE on the calculation...)
That's what I thought... I'm no mathematician LOL
eleveninth
Senior Member
my adapter arrived today. Ordered on the 28th Jan, 11th feb arrived.
ahblack
Senior Member
Nice! 14 days ok la... Got lens to play with it d??
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