Showing posts with label ISO. Show all posts
Showing posts with label ISO. Show all posts

Thursday, September 3, 2015

A look into the night with the Sony A7s (Part 1)

Recently I was able to make a huge investment for myself as a filmmaker. I introduced myself to a new camera, the A7s. I have had my eye on this Sony product for quite sometime now. I have been blown away by it's dynamic range and high ISO capabilities displayed online and now I finally get a chance to use this in a real world setting.

(A still from the A7s, Sigma Art 35mm 1.4)

So where to start? The Sony A7s has so many favorable traits its hard distinguish a starting point. I'll start with my three favorite features and move on throughout each blog post, addressing individual features as we move along. For myself there were a few things that I found desirable about the camera that swayed me to switch from Canon to Sony. First off, variable frame rates. I previously shot on the Canon T3i as it was my starter camera and boy did it get me through some times. However, the highest frame rate you can go is 60fps at 1280x720. This is universal through most Canon DSLRs.
 (Tokina 11-16mm 2.8)

The 5DmkIII, which previously ruled the DSLR world, couldn't compete. The A7s can also be boosted to 120 fps with the downgrade to 1280x720. It can't compete with the Phantom or RED, but for a Full-Frame DSLR, this variability will get the job done. The video posted below is shot completely in 60fps.  All footage is played back in realtime until brought into post to be altered. 



While the variable frame rates are so much fun to play with, thats not all there is to this beast. The ISO is off the charts. Most of the footage above, besides what was indoors, was filmed at upwards of 30,000 ISO. This was my first day with the camera and I really was enjoying this party trick. Grain in the image began to increase as I went up, however it is quite clean around 20,000. Some 50,000 iso footage can even be salvageable. Once you increase upwards of this threshold you will need to use plug-ins like Neat Video to decrease grain levels.

 (Sigma Art 35mm 1.4)

Many filmmakers have highlighted in reviews this outstanding feature, and I hope to learn how to take advantage of this feature and really get some outstanding footage. Once difference I noticed is that the Video ISO is much cleaner at much higher ISOs than the photos. This is due to the sensor only having 12.2mp, thus the pictures suffer loss of quality in order for the video to prevail. Although the resolution is not quite up to par with Cameras like the 5D or even the A7s older brothers the A7 and A7r, the pictures produced still look very nice when paired with the right glass.

While these two capabilities are useful and help with more advanced shooting, you can never forget the little things. The live recording punch in feature is so handy and is something I've been looking forward to for quite some time. Paranoia strikes at the strangest times, especially when conducting interviews. The everlasting battle of not being able to tell if you have something in your eye or if your shot is soft. Being able to punch in and check focus is an amazing feature especially when it comes to doc work, not only in interview settings but out in the field too. The back tilt able LCD screen paired with an amazing EVF makes this camera very diverse. 

(Sigma Art 35mm 1.4)

Using the EVF paired with the punch in focus feature will be great when recording in the field and you need that extra assurance that the subject of your shot, whether that be an animal, mountain top, you name it, is in focus. There are multiple custom keys on this camera that you can arrange which ever is most comfortable for you. I prefer to have my C1 button (located on the top right corner diagonal from the shutter release) to be my short cut to this handy feature, but to each their own. 





I'm very excited to start using this new investment for personal projects, thesis films, and even try my hand at time-lapses. It feels weird making the next step of your career goal and being faced with new and unique situations. While the learning curve in this industry is always changing, this factor is what drives me to be the best I can be. There will be plenty more reviews to come in regards to the time-lapse capabilities, picture profiles, and much more. Until next time. 





Thursday, August 27, 2015

Nightfire: Filming in Verona, Italy

While many of you may have either seen the trailer, or even the full film, Nightfire is probably a talking point you've heard about when hanging out in the Park School. I was lucky enough to travel to Verona, Italy this past January to work as the 1st Camera Assistant for this thesis film. It was a great opportunity to work on a professional run set with amazing actors, crew, and of course gear. Oh, how I miss that gear.


Now as demonstrated in the trailer above there were some quite intricate scenes that occurred throughout the film. From bike chase scenes to explosions, every day was an adventure to say the least. But you must know that this film wasn't made over night, well yes we constantly shot through the night, however, the production lasted 3 weeks and most days we worked for 16 hours with the occasional all nighter shoot. Well choreographed shots and blocking was the name of the game, because when explosions and special effects come into play there are only so many takes you get before you must move to the next shot.

(16mm ARRI Ultra Prime used with the Red Dragon.)

As 1st AC I was in charge of everything from making sure batteries were charged before we went on set(or right before the next big explosion), calibrating our DJI Ronin, even making sure the DP was out of bed in the morning. Now while I look back fondly on this trip, there were some serious road bumps we ran into across the way. 

(View from the watchtower located on the set of the military base.)

First off, the weather. We were filming in the middle of winter in northern Italy, seeing the Alps as we drove to set became a normal part of our day and it was a clear reminder of the winter cold. Not only did you have to bundle up before venturing to set, but we had to make sure the electronics would work properly. 
(Director of Photography, Garret Nicholson, preparing a shot on the Jib)

The entire film was shot on the Red Dragon which had quirks we constantly had to deal with. The first thing to know about Red cameras is that to have a clean image at higher ISOs you must perform what is called "Black shading". Black shading is the process of obtaining the functioning temperature of the Red. Typically this rests around a 45/65 split. There are two temperatures of the camera as you can see in the picture below.



To perform a black shade you will wrap the camera in a sound blanket or jacket, whatever is around really, and ensure that no light is getting to the sensor. It takes about 20 minutes but this will eliminate any grain obtained through high ISOs. However, after the one black shade is run, the camera needs to stay at that temperature of 65/45 (a few degrees off doesn't hurt). With the cold affecting the camera we would always have to have the Red otherwise the camera would drop below operating temp and the grain would trickle back into the shot.

Battery life was short lived and like most sets we needed a charging station. Sometimes it was a room indoors located on set, other times it was out of the back of a van or running off a generator.

(DJI Ronin)

Due to the calibration needed for the DJI Ronin's 3-axis gimbal we were forced to used RED volt batteries. To ensure smooth movement from the rig we had to have perfect balance and the larger batteries would not cut it. These RED volt bricks only last about 30 minutes when the weather is warm,  so when the cold was added it was cut down to 15 minutes at best. To keep the volts warm we resorted to holding onto batteries beneath our long johns and armpits. 

When using a tripod the larger Anton Bauer V-mount batteries were able to be used, but the majority of the film was shot on the Ronin so we had to troubleshoot this problem. When we were constantly running around I would carry the V-mount adapter. After we completed a shot we would set the Ronin on it's stand and plug the AC power adapter in and prepare for the next shot. This was a huge stressor of the trip, since the responsibility of battery master fell upon myself. However, having the AC power truly helped our situation.




Another issue we ran into was difficulties with the wireless follow focus. Due to the cold and issues with the receiver the follow focus would not deliver it's signal. We tried everyday to get the follow focus to work but still struggled to find the solution. In the end we had to just close our iris, cross our fingers, and keep our distance. The follow focus would have been an extreme help, especially for the long tracking shots the movie had. It just goes to show you never know what will happen on set, but you better be damn ready to work around anything that gets in your way. 

(Paul Wolter getting Wild)

Overall, I had the time of my life. Being able to travel across the world for film is something I want to continue to do for the rest of my life. I met amazing people, learned so much about the filmmaking process and how to become a better DP, and the wine made up for any sort of mishaps we had on set during the day. There is so much that I took away from this project but I'd have to write a book to do explain it all, so until then this will suffice. Until next time.