Category Archives: How To

Fringing removal – Processing Private Mentoring

Being a fine art photographer (and a scientist) means that you have a high attention to details. Sometimes it’s a gift, sometimes it’s a curse. But it’s mostly a gift πŸ™‚
It’s almost like having OCD for me at times, and it sure does feel like it when I process my images to allow extremely large printing.

This is what makes the difference between an average photograph and a hit! Here you see the image before and after removing fringes (respectively), zoomed in at 500% :

Sans titre-1 copie

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If you want to learn how to process images that will WOW people, send me a message and we’ll organize private mentoring sessions.

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Testing the Sony FE PZ 28-135mm f/4 G OSS for long exposure photography

IMG_20150417_145332I was very fortunate to get my hands on a Sony FE PZ 28-135mm f/4 G OSS and could not help but test it for long exposure.

You will see below some straight out of camera shots, as two new images that I was able to process. This is not meant to be a full review of the lens, more of a road test to see how well it works for long exposure photography.

General Comments: First of all, let me say that the lens is HUGE! It takes 95mm diameter filters, and feels very sturdy and smooth when using it. It also has a nice foot to mount it directly on a tripod head, which is a nice addition. I never used it though, because my setup was steady enough that I was not bothered by vibrations, however big the lens is.

A quick snapshot of my bag with the lens inside, together with the very nice 16-35 f/4:

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One tip for doing long exposure: no matter the camera or lens, I ALWAYS wrap my setup with a cloth to avoid light leakage from the sides of the mount or lens. I used this lens in the same way, and you’ll see below that I had no diffraction issue: mission accomplished πŸ™‚

 

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Un-processed images: Now let’s look at a few “almost SOOC” images: (almost because some have been stitched)

DSC01342_adj copieEXIF: 28-135mm @28mm, f/8, ~8 minutes, ISO 50, ND16 Firecrest filter

Panorama sans titre2 copieEXIF: 2 images after stitching, 28-135mm @45mm, f/8, ~4 minutes each image, ISO 50, ND16 Firecrest filter

DSC01425 copieEXIF: 3 images after stitching, 28-135mm @72mm, f/8, ~3 minutes each image, ISO 100, ND16 Firecrest filter

Β Pretty good, right? πŸ™‚

Final images: Now let’s see a couple images after processing:

DSC01425 copie_resizeEXIF: 3 images after stitching, 28-135mm @72mm, f/8, ~3 minutes each image, ISO 100, ND16 Firecrest filter

DSC01509 copie_resize EXIF: 3 images after stitching, 28-135mm @80mm, f/8, ~3 minutes each image, ISO 100, ND16 Firecrest filter

 

Conclusion: I have made up my mind. Even if the lens is mostly made for video, it’s an amazing piece of hardware, including for long exposure. The constant f/4 aperture is also a great treat. I am going to make this lens a permanent addition to my gear!

As usual, don’t hesitate to comment or ask questions below or in PM.

Building a technical camera – Part IV

20150322_130154Step Four of Building a technical camera: adding left/right shifting to the back element

Last time, I showed you the results of milling out a chunk of the back element of the Fuji camera. Today, I’ll show you why I did it, and how to mount different parts together and insure they are perfectly parallel or perpendicular to each other.

For that particular step, I bought a cheap Chinese precision rail system on eBay. For $8 USD, it’s hard to get a better system that can be modified, drilled, cut or tapped. The following picture shows you exactly what this part looks like before modifying and mounting on the camera.

DSC01151First step was to take apart the rail itself (with the screw sticking out of the slot), from the support piece that is originally meant to attach on the tripod head. In the final design, the parts will be flipped: the rail will become the support (attached to the camera, see below) and the other part with the precise movement knob and the stopper. The latter part will be modified so I can attach a support plate for the camera.20150404_192705

You will find below a few pictures that I shot while adjusting the rail to the camera so that these two part are perfectly perpendicular to each other. This step is very delicate, because the slightest misalignment between them will lead to the sensor plane not being perpendicular to the lenses, effectively creating unwanted tilt. 20150404_192717

To make sure the parts were perpendicular, I used the precision of the milling machine and an indicator, see below:

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Just so you have a better sense of what things will look like eventually, here is a photograph of the back element with the inverted support part that I’ll drill and tap in order to mound the camera standard:20150404_193117No a few photographs of the camera with the rail system, where you can see how left/right shift will work:

DSC01173 DSC01171 DSC01164 DSC01160 Next step:

Drill the rear standard support (part with the two knobs in the pictures higher).

Conclusions:

1/ this was one of the most delicate but easiest steps so far. Easiest when you have the right tools, but these are hard to come by and even harder to let a machinist let you use his toys πŸ™‚

2/ I found a solution to add rear swing (left/right tilt) by ordering a precise optical rotating stage for about $80 USD from China. I’ll give you the details in a later post if you are interested (please use the comment below if so). I’ll first work on a prototype that won’t have swing, see how it goes and then add the rotating stage.

Building a technical camera – Part III

20150404_183123Step Three of Building a technical camera: milling out part of the back element

Good news! I was able to modify the back element of the Fuji GX camera that I took apart some time ago (see here for details about taking this guy apart).

Did I mention this project is VERY exciting? Yes? Well, I’m even more excited, and using power tools is something I really enjoy.

And so I was really happy to use a milling machine (see picture higher; big fancy machine) in order to remove parts of the back element of the camera in order to make a nice platform I will use to fix a rail for left/right (pano) movement.

ATTENTION: I would like to stress out that you should not use power tools and machine aluminum (or any other material for that matter) yourself if you do not know how to use such tools. They are extremely dangerous if not used properly, and they can injure badly, or worse… So please be careful, and let the “pros” handle them πŸ™‚

As a reminder, you’ll find below the picture of the camera “skeleton” showing with red arrows the parts of the back element that need to be removed (milled):

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You will see in the next few photographs the part after milling. For those who are not familiar with machining, you can see where I removed metal because it looks all shiny / silver. As I mentioned before, I had to remove the posts for the screws entirely, as well as some of the front and back vertical stands to make a nice leveled platform.

Let me point out that the level must be as close to perfection as possible, if one want to ensure movement in the horizontal plane rather than having a left/right shifted image that will be higher or lower than the previously shot image.

20150404_183158 20150404_183140 20150404_183130Let’s do a comparison of before and after milling:

11046131_10153153202593485_1501836423_o20150322_130154 20150322_130218Next step:

Fix the rail system where you can see the nuts in the last two pictures. This rail will be used in order to shift the camera left and right in order to make panoramas. This is another very delicate step, as the rail needs to be perfectly parallel to the stands of the back element (that is perfectly perpendicular to the optical axis), unless it will introduce a change in the position of the sensor plane while shifting, therefore leading to unwanted blur in the final image.

Conclusions:

1/ I had lots of fun milling the back part of the Fuji camera. Making chips and machining using tools like a milling machine is incredibly fun, but you have to be very careful and need to know what you’re doing, so PLEASE don’t do it yourself if you have not been taught how to.

2/ Now that’s it, even if I wanted to go back and put the camera in it’s original state I could not. I am not overly concerned the project won’t work, but when you take one like this you have to keep in your mind you may waste a lot of money and time. But it’s a risk I’m willing to take because it’s fun, and also because the goals are well worth the risks πŸ˜‰

3/ You have to plan well in advance about the next steps you’ll take, if only because you have to order parts which may come from China and take time to get there. I have to admit I am better advanced than I’m showing right now, and things are looking good for now.

Building a technical camera – Part II

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Step Two of Building a technical camera: taking apart a GX680

For those of you who did not see my first post about it, you can find it here. In a few words, after many discussions with my photographer friend Satoru Murata, I decided to throw myself into a new project: building a technical camera that I can use to mount almost any lens on a Sony a7/II/R/S body, much like the Cambo Actus system, but on the cheap side.

Getting to it now. You will find higher and below a few pictures of the (very functional) Fuji GX6800 III I bought recently and took apart these last few days…

Scary, right? πŸ™‚

Because it was the first time I took one apart, I actually ended up removing more parts than I should have, but I guess it does not matter too much since I’ll show you next that I basically milled (cut out with a power tool) entire parts of the camera (already done) and I’m now too committed to go back and put things back together.20150322_125815

To get to the bare minimum of the camera (front, back elements and railing, see the terrible phone picture below), all I needed to do was de-attach the bellows from the front and back elements, and mostly to unscrew and remove the camera body (back element) from the railing system.

11046131_10153153202593485_1501836423_oThe idea now is to keep the front standard as is, because it has all sorts of movements (tilt, shift, swing) for the lens. However, I want to modify (mill) the back element in order to remove the different parts with red arrows on the picture below: a couple of posts that were used to screw the body on and the front and rear metal parts on which it rested.

The goal is to create a platform on which I can fix a 2-way rail. This rail will eventually be used as a support for the camera board and it will allow for left/right shifting of the camera (great for shooting panos, blue arrows on the picture below).

Sans titre-1 copieI’m also thinking about adding swing to the back of the camera. The way I see it, it will require a precision rotating stage (similar to what can be found in science labs doing optics), but I’m having issues finding something cheap and precise enough. Ideally, it also has to be about 1 to 2 inches (~25-50mm) in diameter and I would like to have: a knob to rotate the stage, and one to lock in it place. It also needs to handle 3-4 pounds (~2kg) of weight. If you have suggestions, please fire away!

Conclusions of this part:

1/ Taking this guy apart was easy peasy, and probably the most straightforward part of the project. I can’t stress enough that I’m happy I’ll never have to put the Fuji back together. It seems now that I have multiple small parts all over my work table, and I have no clue where most of them would go πŸ™‚

2/ Next part is using a milling machine to reduce some of the back element in order to create a nice resting platform. I’ll show you some pictures of this step, but if you are not familiar with how to work these machines, please don’t go ahead on your own repeating what I’ll do. You can get hurt. Badly. If not worse.

3/ If you are aware of where to acquire new or used (small 1 to 2” dia) rotating stages (with a precision adjustment knob and able to carry ~3-4 pounds), please shoot me a message. I am currently designing the next steps, and would love to get my hands on one. Worse case scenario, I’ll start with a prototype that does not have swing if I can’t find one.

4/ As usual, if you have questions or ideas, send them my way!

Till next time!

Building a technical camera – Part I

$_57Fuji GX680 III basic body with rear and front elements and bellows. Missing lens, film back and viewfinder.

Step One of Building a technical camera

I have a new project: the ultimate DIY camera fun.

After much discussion with my buddy Satoru Murata, I decided to take on a project for the next few weeks. I will share with you some of the steps I will take into building a technical view camera… of sorts.

For those who are not familiar with such cameras, you can find a description here and a sketch below: http://en.wikipedia.org/wiki/View_camera

In a few words, this camera is made of a front board which holds a lens, and bellows that ensure the image coming from the lens goes without interference to a back element containing film or a digital sensor (there are also other types of capturing media but no need to go into such details here). What makes this type of camera special is the ability to move the front (and back) element in order to obtain large amounts of tilt and shift.

If you have been following me for a little while, you know that I use tilt and especially shift in my work, and sometimes using such special lenses in particular situations (for instance when you find yourself very close to the subject). For those who are into technicalities, another limitation of regular modern style T/S lenses is that movement happens at the front of the camera and not at the back. Back movement is however preferable because moving the front element changes the position of the image circle, and it usually is better to tilt (in particular) the rear element rather than the lens in order to avoid such changes in image circle position.

Now, you also now that I use Sony cameras for my work, as well as different sorts of lenses, ranging from modern and old Full Frame lenses to 30-ish years old Medium Format lenses (and I even also do Large Format film for fun). All these lenses are great, and MF provides a larger image circle, meaning that I can do larger movements than with FF lenses. Unfortunately, none of the adapters available on the market allow for full access to the MF lenses image circle, and some of them simply cannot be used, period (such as Mamiya RZ67). It is also impossible to use LF lenses on modern FF or MF dSLRs and backs.

So here is the idea: build a technical camera that will let me mount ANY (and I insist on ANY) lens (FF, MF, LF) on a modern digital FF mirrorless dSLR or MF back, and give TILT and SHIFT movement both at the front and back elements.

After some research online, I found that people can hack a Fuji GX680 body into doing something like this.

So I present you a new member in the family: a cheap (~$200 USD) Fuji GX680 III body which I will start stripping off its different elements in order to keep only the base body and moving elements.

$_573245Next steps to come, after I removed all the unnecessary parts! πŸ™‚

On a different note, I’ll need to find this camera a name after it’s finished… let me know if you have suggestions! πŸ™‚

Upcoming Long Exposure Workshop in Maine

flyer-4 copyWell, seems like it took me a little longer than expected to share it, but behold! πŸ™‚

I am glad to announce that I will be mentoring a workshop with Satoru Murata in Maine March 28-29.
You will learn how to shoot and process unique and breathtaking long exposure seascape photography, and we will visit 5 of the most iconic lighthouses of the Portland and Rockland areas.
This workshop is supported by some of the major players in the industry: @Sony, Formatt-Hitech, SmugMug, Mirex and HCam.de, so be prepared for some surprises!

Places are limited to 8 in order to give you the best experience possible, and the first two to register will have a 10% discount.
Attendees are welcome to register to any or both days of the workshop.
Sunrise and sunset options are also available.

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So check out the details and program here:
http://www.thibaultroland.com/Workshops
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And don’t hesitate to get in touch if you have questions!

For examples of what subjects we will shoot, take a look at my series:
http://www.thibaultroland.com/Beacon-of-Hope

Please feel free to share, thanks!

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