Pages

Showing posts with label Equipment. Show all posts
Showing posts with label Equipment. Show all posts

Thursday, August 2, 2012

Test of Nikon D800e, a DX lens and a Teleconverter

I was fortunate to finally get a Nikon D800e (36 Mpx) after a brief 3 month wait. I didn't, and I also think its the same with Nikon, expect that there would be such a huge demand for this camera. I don't know why Nikon seemed to leap so far ahead with its next generation but I'm grateful. I think there are millions (well a whole bunch anyway) more who also think the same.

This is a full frame camera and a DX lens will work but is cropped due to limited image area. The camera even has mode where it will auto detect a DX lens and crop accordingly. Knowing that there is still a little more image available with the DX crop I decided not to crop and use whatever was available.

Nikon D800e with 70-200mm f2.8 VR. The image on right is actual size of window pane

My favorite DX lens is the 18-200mm f3.5 VR and as I travel around I notice others who like this lens. While it may have some pincushion and barrel distortion, thanks to Photoshop lens correction, this is almost all eliminated.
Nikon D800e with 70-200mm f2.8 VR set to 1.2 crop. The image on right is actual size of window pane. I didn't realize at first that the crop factor also applied to FX lens.

It was while I was performing a resolution test with my D300 and the new D800e by using both the 18-200mm f3.5 VR and the 70-200mm f2.8 VR that I noticed that when full zoomed on the DX lens that vignetting seemed to disappear, but looked like a dime at 18mm.

This excited me more than the current test and therefore I decided to pursue this further.

The 18-200mm is really like a 24-300mm on a DX camera due to the 1.5 crop factor and this range will meet about 90% of my needs. With a 1.4 teleconverter on the FX camera it's now almost the same range as on a DX camera.


The test I performed was hand-held as I didn't need with this test to check for perfect resolution. I stood in front of a large apartment building in the parking lot across the street and remained at the same position while I changed the lens focal length.

In the 1st test, see film strip below, there is significant vignetting in the 18mm and slowly reduces as the focal length is increased. Even at 200mm there is still slight vignetting at the corners.
When the teleconverter was added then magic seemed to appear. At 18mm there is only slight vignetting at the corners and disappears by 24mm. The film strip below shows the changes with teleconverter added.

Now a favorite lens becomes useful on my full frame camera.

Most lens that have such a wide range of focal lens is all about compromises when being designed and built. The same with the 18-200mm f3.5 VR. Photoshop easily handles the barrel distortion. But this lens at the glass edge, maybe more is being used now, also has a fair amount of chromatic appellation. This is also handled well with Photoshop. Since most artistic images don't need to be sharp or well defined at the corners of a photograph then any additional distortion caused by using more lens area is not really a problem with digital-editing.

So when and if you do decide to go full frame one day then your DX glass can be useful with a teleconverter.

The reason this works is because the lens is now further from the sensor and therefore increases in size on sensor chip. Take a magnifying glass and hold it to show an image appearing upside down on a piece of paper. Now move the magnifying glass further away and watch how the image on the paper grows larger. The same happens with a teleconverter attached.


Niels Henriksen

Monday, February 13, 2012

Using the Camera GPS to find the Sunken Church In San Miguel


I've now been in San Miguel de Allende for almost 6 weeks, about half way through our winter stay here. I have been enjoying all flavours and experiences that this city has to offer. I've even experienced some of the standard tourist events such as fighting with the Aztec gods (Montezuma of course). This laid me low for a few days but unfortunately after a few days when I thought I was getting better I developed a secondary infection that required visiting the doctor and getting medication. Now after 2 weeks I'm finally starting to get the spring back in my step and venturing back out. This does curtail your photography.


But back to the GPS item. Several weeks ago my friend Mike took me out to see the sunken church on the large shallow lake south-east of San Miguel.  The lake is really a reservoir and during the dry season, winter here, the church becomes fully visible.  The ground is still too mucky to be able to walk all the way out, but you can get close enough for some good shots.


If you look closely you can see some cacti growing out of the top portion of the church spire and therefore the church is not completely sunken.

What was really surprising when we first arrived was that we saw pelicans, which to many may not be unusual near water but this is at an elevation of 6,000ft and and 550 km from the nearest ocean.


I've been using on-camera GPS for almost 3 years, at least capturing the meta data with the image but I've never had to really use the info as until now I've always known exactly where I was. Not this time as this was new territory, so when I tried to use the Nikon format to enter into Google maps it took a while to find a site that would convert correctly.

Nikon gives a format such as:
Longitude:  20,52.1567N
Latitude:     100,50.1574W
Altitude:     1853m

Nikon is not DDD, MMM, SSS (Degrees, Minutes , Seconds but in format of DDD, MMM.MMMM)

Whereas Google maps required decimal degrees only in format DDD.DDDDD.

After some web searching I did find one site that would provide conversion in the Nikon format.

Nikon GPS Converter

In the Google map below the green arrow shows where I took the photo of the church above and the red arrow the top of church spire above the water.  This Google map (satellite view) was taken when the area was flooded. It is a bit strange to see that where you were standing is now underwater. A little north east of red arrow is a round ring. This is visible in the last photo of this article.


Towards the hill on the south-east in the map above is another church, not sunken but still abandoned.

Most of the foliage,except for the cacti at this time of year, is brown. This make a colour image rather drab. But converting to B&W and adding some contrast can make the photo stand out more.

In the image below the green cacti with a blue sky does make a colour version work better.


Below is the map and the green arrow shows where I was standing taking the photo above with the cacti.


As you can see the camera GPS is very accurate in capturing within feet where you where standing at the time when photograph is taken.
Another version of the sunken church where you can see the round ring that shows up beside the spire in the Google water map.

  Church with ring structure

Niels Henriksen

Monday, October 27, 2008

Heddal Church Norway - D300 at ISO 6400




The completely wooden Heddal Stave church just outside Notodden Norway gave a good opportunity to test out the capabilities of the D300 at iso 6400. I did bring my tripod with me but for the many day excursions it was a lot easier to just attach the Nikon 18-200mm vr lens and increase the iso to compensate for low light situations.




These Stave churches were built from the early 11th century to the 15th century. At one time there were approximately 800 to 1,000 of these churches built and now only 25 remain. Since these are built entirely of wood many were easily destroyed by fire.




iso 6400, 1/40 sec, f4.5, 24.0mm



This is a view from inside the main chapel. There is no electrical light in the church and it is all lit by the window openings at the top and a few candles near the altar. It is extremely dim inside and a perfect test for the camera capabilities. The metal tubes you see in this image are part of the current sprinkler system to prevent it from being burnt. On the outside along the entire roof sections are other sprinkler nozzles.

Being all wood it was easy to limit the colour noise by de-saturating the colour a bit and then adding a light reddish brown layer set to colour to bring out the warm tones. In Adobe Raw I did set the colour and noise to almost max settings.




This is the Heddal church, built in the12trh century, is a triple stave church and is now the largest remaining church.


Close-up view of the outside hand cut shingles covering all the roof and wall sections.




ISO 6400, 1/40 sec, f4.5 , 24.0mm



The above image is of the altar, which is mostly lit by candles and the top window light does not reach into the altar enclave.





iso 6400, 1/20 sec, f4.5, 24.0mm



In the image above you can see the rose painting covering the inside walls. This painting covers some of the more Norse Viking type scenes that originally decorated the walls. It was repainted with the new abstract patterns as the Viking images became out of favour and the Christian teachings and Viking mythology slowly disappeared.

You will notice how the WB has changed from the walls at top being lit by outside light and the post at bottom being lit by candles and therefore a redder tone.






iso 6400, 1/30 sec, f5.0, 24.0mm



Around the bottom of the church is a corridor that runs around the whole of the chapel and there are different doors to go in. This is part of the carvings that surround these giant 10 foot doors.




Near the church is a site where they have moved several log cabins as an historic site. You can see the brightly lit rose painting or rosemailing. This is the same as in the church but here we have many windows that provide more light into the interior.




This is a shed on the site but the larger log cabins are built the same method.
You will notice that the log cabin sits on stills and then there is a log split in half and with a flat side on the bottom. This is to prevent rodents from getting into the houses. Note how the steps do not attach to the building, which also keeps them out.

The D300 does a good job of image capture at the higher iso setting of 1600, 3200, and 6400. They are nosier than lower settings but still produce great shots. If you shoot with film and I think the highest was 3200 B&W, these shots would normally not be possible and if you did have very fast film the grain would be very pronounced. I do like the B&W film grain better as the luminance speckles were more random in size and tended to produce better patterns.

You do need to use the luminance and colour noise reduction to improve it. The use of sharpening is not recommended, as it will enhance the noise.

The best method is still to use a tripod and go for longer exposure, but when not possible having an image stabilized lens and high iso, you now are able to get very reasonable images that would not be normally possible.



Niels Henriksen

Sunday, July 27, 2008

Getting Ready – My Vacation Camera Selection


Please note that there may not be any new posts until 7 September.


This weekend is the practice weekend. By practice I mean fine-tuning the selection of items I plan to bring on my month long stay in Denmark with a short excursion to Norway and Sweden.

In this article, as I don’t see much value with showing my equipment, I will include a few images from a shoot at Vincent Massey Park.

Tamron 90mm f2.8 macro mode, f3.5, iso 200 1/8000sec

This is another image of a flower I showed in the article Spring Time Tune-up I decided to make this Black and White version to better focus on the softness of the petals, almost like dancing flames in a fire. I reduced the contrast to try a keep soft and ethereal.



My normal planning mode is to bring everything possible that I might use and then hire an ocean liner just to bring along. Luckily, my many years of weeklong sea-kayaking has forced me to par down the kit, back to bare essentials and then dump half of that.

This vacation is mainly a family vacation visiting my newfound brothers and sisters and then just sitting on the porch or beach side and talking about lost times.

But, and a Big But I will have my camera permanently glued to my hand. I just don’t know any better. There will be moments where in the interest of everyone’s sanity that I will need to venture off, explore and photograph, just on my own.


Tamron 90mm f2.8 macro mode, f16, iso 200 1/600sec

This is the same flower as above but here I increased the DOF to include all petals and then increased both the colour saturation and the contrast to add more punch and vibrancy to the flower. It is amazing that with simple camera techniques and very minor editing you can create 2 very different images of the same subject.


There is one special day being set aside when my brother Jorgen, who is also an avid photographer, and I will photograph the unique qualities of Copenhagen. Starting in the early morning, we will be traveling by bus around town, getting off where we want, explore, photograph, eat, then moving on and doing it again at least the eating part. This should last well into the late evening and hopefully collect a great collection of images.

If this were a photography vacation I would bring more equipment, but with the mixture of family and photography I have pared my list to the following.


Main Items
Nikon D300 – with 2 battery packs and charger
If this were a photography excursion I would bring my Nikon D70 as a backup

Nikon 18-200mm f3.5 vr lens
This is a great vestal lens. While I love the Nikon 70-200mm f2.8 vr, the weight is a bit of a problem when traveling light.

Nikon 50mm f1.8 lens
With the great high iso noise of the D300 and the fast glass of the 50mm, who needs flash or even any kind of light.

Sigma 10-20mm f3.5 lens
I just love the perspective this lens gives to cityscapes.

SB800 flash
A great powerful flash but the best part is the wireless capability with TTL.

Tripod - Gorilla Pod (largest)
I would love to bring a full size tripod but the only one I have is the steel Manfrotto, which is heavy when, added with a good ball head. The cost of those carbon fibers is still a bit much, but one day I will save up enough.

Backpack –Lowenpro
This pack has padded shoulder straps and a hip belt, which are a must if you plan to walk around a fair bit.


Tamron 90mm f2.8 macro mode, f13, iso 400, 1/50sec

Simple weeds when in bloom can provide inspiring flower images.

Miscellaneous items
Polarizer filter for 18-200mm lens
Battery charger and many batteries
Lens cleaning brush
16GB, 8GB cards
Flashtrax 40GB auto card reader and storage.
Nikon SC-28 Flash cable
D300 manual – because I am still learning about it.
Cannon A40 2mp P&S camera
Energy bars and medical kit
Just in case I am so engrossed that either I walk off a cliff while looking through the viewfinder or get lost in the woods.


I would like to post a few articles and that is why I am bringing the old digital camera, as it will at least be in jpeg mode. The Nikon will set RAW and I am not sure if I will have access to a RAW converter.

Nikon 70-200mm f2.8 vr, at 70mm,f7.1, iso 200, 1/80

One of the many paths in Vincent Masseey Park that runs along the Rideau River.


At first I was a little worried about not posting for several weeks, but then after giving it some though I realized it is really a non-issue. I don’t use this blog as a business or make money from it. It is in some ways like a gallery where I hang my images and through my words you may come to understand the artist a bit more. Like any gallery I do enjoy the visitors that drop in and I hope you will all return when I post again.

The first article will most likely be how well the selection of camera equipment worked on my vacation. What I used most, least and what I wish I had brought.

Thanks for your visit and see you in September.

Niels Henriksen


My Own Words

For photographers real beauty is when the ordinary, the every day, and sometimes the horror of life, is seen through the passion of our artistic work with the aid of a little box.

Sunday, May 20, 2007

1933 Voiglander Bessa II




When it comes to photography and I guess most things in general I love technology when it helps me achieve my goals. That learning curve is something else, as initially there is hesitation and tiredness at having to learn once again something that I think I already know at least with older equipment.

That is why I love the simplicity of my old cameras, which I occasionally use. To take them of their display shelf, load the film and venture off are special moments.

My oldest is a 1933 Voiglander Bessa medium format 6x6 and 6x9 (which is the size I use most. It does get much simpler that this unless you are into pinhole cameras. All manual, no electronics or batteries to go wrong. Set the focal distance, f-stop, shutter speed and cock the shutter. Point and shoot.

There is something magical about its simplicity.

This is a photo of a group shot taken on a bright day with a large dynamic range.



A section (see red Box) has been cropped to show the detail you are able to capture on 6x9 format.



There are 2 pleasures form owning older cameras, one is looking and examining them in your hands, the other is taking very interesting photos. Take the time to scour Ebay or vintages stores and these can be acquired cheaply. Most large towns and cities still and process these films

Niels Henriksen



Photo Blogs - BlogCatalog Blog Directory

Like

Related Posts with Thumbnails