Wide and fast for low light

Noa Put · December 17th, 2014, 12:04 PM

Yes, there is a larger cropfactor in 4k, I currently shoot with my gh3 with a 12mm lens on a steadicam and I find that lens just wide enough, 15mm on the gh4 in 4K would not be wide enough for my use.

Bryce Comer · December 17th, 2014, 02:14 PM

Yes the crop factor in 4K is 2.3x, so a 15mm lens has roughly a 34.5mm field of view (in 35mm terms.)

Pete Carney · December 18th, 2014, 05:59 PM

The crop factor in 4K UHD is actually 2.49x as has been spoken about often on many of the forums.

I use a 17mm f/1.8 on a stabilizer quite often and like Noa says, it's very difficult to use with it's 42mm equivalent field of view in 4K. I will often switch back to 1080-60p just to get that little bit wider. I definitely need to pick up a fast 10 or 12mm for stabilizer work so that it is much simpler to keep the subject in frame and the camera movements to a minimum.

Cheers,
Pete

Luc Spencer · December 19th, 2014, 04:45 PM

Well this is a bit of a disappointment. I've watched quite a few youtube vids on the GH4 and nobody pointed this out as far as I can remember. I'm guessing the 8k on the GH5 will crop even more then? :)

Noa Put · December 19th, 2014, 05:58 PM

It was not exactly a secret that the gh4 had a cropfactor in 4K, a 12mm is a good wide focal length in 4K though in very tight spots you will need the 7-14mm f4.0, only that's too slow for weddings unless you get the new olympus 7-14mm f2.8 but I find f2.8 still to slow for most of my work as I need least f2.0 and faster lenses to get the job done. I also need autofocus to quickly lock focus before I start shooting so then a 12mm f2.0 is the fastest and widest you can get.

Luc Spencer · December 20th, 2014, 06:05 AM

that is my EXACT feeling, Noa! just regarding the 12-35mm f/2.8 from Panasonic. I have a friend here who's been filming weddings since the 90s and keeps telling me to get that lens because it will help me a lot... and I'm sure it will, up until the reception where there is no more daylight and in some situations the ISO will stay at 3200 or higher with my 14mm f/2.5.

So f/2.8 is definitely NOT ok for that part. The 15mm f/1.7 would be a dream, and a cheaper dream than that Olympus 12mm... but, like you said, might not be wide enough in some cases...

Danie Pretorius · January 6th, 2015, 02:47 AM

Great footage and promo Noa! Beautiful shots! What slider did you use in the shots? Nice and smooth!

Luc Spencer · March 25th, 2015, 06:50 AM

I don't want to make another thread so I'll just post in here since it's relevant.

I recently acquired a camera stabilizer and noticed that my Panasonic 14mm lens is not nearly wide enough to make that steadycam footage look GOOD. Therefore, my next purchase has to be a wider lens.

Because most videographers I know love to use a 14mm lens (full frame 14mm), I am considering the Rokinon 7.5mm f/3.5 fish-eye. Yes, it is a fisheye lens but apparently you can de-fisheye the footage, like this guy has:

Budget is not that high ($400 max), so if you guys think I'd be better off with something else at this sort of price, please let me know. I am concerned that f/3.5 is going to be kind of unusable for wedding receptions, but the Oly 12mm f/2.0 is not wide enough and too expensive. The new Voigtlander 10.5mm f/0.95 would be both wide enough and definitely fast enough... but I doubt I'll be able to afford it *sigh*

Thanks again.

Noa Put · March 25th, 2015, 08:10 AM

I don't like the rokinon 7,5mm as it's soft in comparison with my panasonic and olympus lenses, I do use it for a very select type of shots, usually gets used just once during a wedding.

Another cheap option is the Olympus 9-18mm but it' also is not a fast lens but other then that there are no more cheap and fast super wide angles lenses availabale for m4/3

Noa Put · March 25th, 2015, 08:16 AM

If you would be interested, I"m selling my samyang 7,5mm with m4/3 mount for about half it's newprice: 150 euro excl sendingcosts. Will be putting some more gear up for sale by the end of the week but this lens will be a part of it.

Luc Spencer · March 25th, 2015, 09:14 AM

Noa I will definitely want to buy that if you're selling it. The only problem is that I have 2 events at the end of next month, and no money until then since I just bought a steadycam. You have my email, let me know what else you are selling, I might be interested. And thank you :)

PS: your Samyang can't be worse than the full frame 14mm Samyang that a friend of mine uses on his 5D, that one is just bad at everything... color accuracy, sharpness, ugly distortion.

December 17th, 2014, 12:04 PM	#16
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Wide and fast for low light Yes, there is a larger cropfactor in 4k, I currently shoot with my gh3 with a 12mm lens on a steadicam and I find that lens just wide enough, 15mm on the gh4 in 4K would not be wide enough for my use.

December 17th, 2014, 02:14 PM	#17
Bryce Comer Trustee Join Date: Jun 2007 Location: Rossland, British Columbia Posts: 1,024	Re: Wide and fast for low light Yes the crop factor in 4K is 2.3x, so a 15mm lens has roughly a 34.5mm field of view (in 35mm terms.) __________________ There's never enough hours in the day!

December 18th, 2014, 05:59 PM	#18
Pete Carney Regular Crew Join Date: Mar 2011 Location: Salt Lake City, Utah Posts: 65	Re: Wide and fast for low light The crop factor in 4K UHD is actually 2.49x as has been spoken about often on many of the forums. I use a 17mm f/1.8 on a stabilizer quite often and like Noa says, it's very difficult to use with it's 42mm equivalent field of view in 4K. I will often switch back to 1080-60p just to get that little bit wider. I definitely need to pick up a fast 10 or 12mm for stabilizer work so that it is much simpler to keep the subject in frame and the camera movements to a minimum. Cheers, Pete

December 19th, 2014, 04:45 PM	#19
Luc Spencer Major Player Join Date: Feb 2012 Location: Romania Posts: 201	Re: Wide and fast for low light Well this is a bit of a disappointment. I've watched quite a few youtube vids on the GH4 and nobody pointed this out as far as I can remember. I'm guessing the 8k on the GH5 will crop even more then? :)

December 19th, 2014, 05:58 PM	#20
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Wide and fast for low light It was not exactly a secret that the gh4 had a cropfactor in 4K, a 12mm is a good wide focal length in 4K though in very tight spots you will need the 7-14mm f4.0, only that's too slow for weddings unless you get the new olympus 7-14mm f2.8 but I find f2.8 still to slow for most of my work as I need least f2.0 and faster lenses to get the job done. I also need autofocus to quickly lock focus before I start shooting so then a 12mm f2.0 is the fastest and widest you can get.

December 20th, 2014, 06:05 AM	#21
Luc Spencer Major Player Join Date: Feb 2012 Location: Romania Posts: 201	Re: Wide and fast for low light that is my EXACT feeling, Noa! just regarding the 12-35mm f/2.8 from Panasonic. I have a friend here who's been filming weddings since the 90s and keeps telling me to get that lens because it will help me a lot... and I'm sure it will, up until the reception where there is no more daylight and in some situations the ISO will stay at 3200 or higher with my 14mm f/2.5. So f/2.8 is definitely NOT ok for that part. The 15mm f/1.7 would be a dream, and a cheaper dream than that Olympus 12mm... but, like you said, might not be wide enough in some cases...

January 6th, 2015, 02:47 AM	#22
Danie Pretorius Regular Crew Join Date: Dec 2002 Location: Pretoria South Africa Posts: 39	Re: Wide and fast for low light Great footage and promo Noa! Beautiful shots! What slider did you use in the shots? Nice and smooth! __________________ Sony EX3 XD CAM EX, Canon XL1, Adobe CS6 Production Suite, Intel i7 950 (P6X58D-E Motherboard), 12GB RAM, Pretoria, South Africa

March 25th, 2015, 06:50 AM	#23
Luc Spencer Major Player Join Date: Feb 2012 Location: Romania Posts: 201	Re: Wide and fast for low light I don't want to make another thread so I'll just post in here since it's relevant. I recently acquired a camera stabilizer and noticed that my Panasonic 14mm lens is not nearly wide enough to make that steadycam footage look GOOD. Therefore, my next purchase has to be a wider lens. Because most videographers I know love to use a 14mm lens (full frame 14mm), I am considering the Rokinon 7.5mm f/3.5 fish-eye. Yes, it is a fisheye lens but apparently you can de-fisheye the footage, like this guy has: Lens review: 7.5mm Fish-eye for MFT Samyang / Rokinon / Bower / Walimex Pro - YouTube Budget is not that high ($400 max), so if you guys think I'd be better off with something else at this sort of price, please let me know. I am concerned that f/3.5 is going to be kind of unusable for wedding receptions, but the Oly 12mm f/2.0 is not wide enough and too expensive. The new Voigtlander 10.5mm f/0.95 would be both wide enough and definitely fast enough... but I doubt I'll be able to afford it sigh Thanks again.

March 25th, 2015, 08:10 AM	#24
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Wide and fast for low light I don't like the rokinon 7,5mm as it's soft in comparison with my panasonic and olympus lenses, I do use it for a very select type of shots, usually gets used just once during a wedding. Another cheap option is the Olympus 9-18mm but it' also is not a fast lens but other then that there are no more cheap and fast super wide angles lenses availabale for m4/3

March 25th, 2015, 08:16 AM	#25
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Wide and fast for low light If you would be interested, I"m selling my samyang 7,5mm with m4/3 mount for about half it's newprice: 150 euro excl sendingcosts. Will be putting some more gear up for sale by the end of the week but this lens will be a part of it.

March 25th, 2015, 09:14 AM	#26
Luc Spencer Major Player Join Date: Feb 2012 Location: Romania Posts: 201	Re: Wide and fast for low light Noa I will definitely want to buy that if you're selling it. The only problem is that I have 2 events at the end of next month, and no money until then since I just bought a steadycam. You have my email, let me know what else you are selling, I might be interested. And thank you :) PS: your Samyang can't be worse than the full frame 14mm Samyang that a friend of mine uses on his 5D, that one is just bad at everything... color accuracy, sharpness, ugly distortion.