October 31, 2014, 01:20:26 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - dolina

Pages: 1 ... 35 36 [37] 38 39 ... 68
541
Animal Kingdom / Re: Birds of the Philippines
« on: April 07, 2013, 03:29:32 PM »

Philippine Bulbul (Hypsipetes philippinus) by alabang, on Flickr

The Philippine Bulbul (Hypsipetes philippinus) is a songbird species in the bulbul family (Pycnonotidae). It is often placed in the genus Ixos, but is better retained in Hypsipetes as long as this is not entirely merged into Ixos, as it is quite closely related to the type species of Hypsipetes, the Black Bulbul (H. leucocephalus).[1]

It is endemic to the Philippines. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests; on Mount Kitanglad on Mindanao for example it is abundant in any kind of primary forest at least between 500 and 2,250 m ASL.[2]

Fledglings of the Philippine Bulbul were recorded on Mindanao in late April, but the breeding season seems to be prolonged as females with ripe ovarian follicles were still found in April and May. Territorial songs are heard at lower altitudes as late as May, while further upslope the birds are silent at that time of year and presumably engaged in breeding activity. The Besra (Accipiter virgatus) has been recorded as a predator of young Philippine Bulbuls, and this or other goshawks might also catch adult birds.[3]

A common and adaptable bird as long as sufficient forest remains, it is not considered a threatened species by the IUCN.[4]

Source: http://en.wikipedia.org/wiki/Philippine_Bulbul

Taken: http://en.wikipedia.org/wiki/Ternate,_Cavite

Settings: 1/80 ƒ/5.6 ISO160 800mm

542
Canon EF Prime Lenses / Re: Canon EF 800mm f/5.6L IS USM
« on: April 06, 2013, 11:46:24 AM »
Time to perk this thread again...


Philippine Bulbul (Hypsipetes philippinus) by alabang, on Flickr

The Philippine Bulbul (Hypsipetes philippinus) is a songbird species in the bulbul family (Pycnonotidae). It is often placed in the genus Ixos, but is better retained in Hypsipetes as long as this is not entirely merged into Ixos, as it is quite closely related to the type species of Hypsipetes, the Black Bulbul (H. leucocephalus).[1]

It is endemic to the Philippines. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests; on Mount Kitanglad on Mindanao for example it is abundant in any kind of primary forest at least between 500 and 2,250 m ASL.[2]

Fledglings of the Philippine Bulbul were recorded on Mindanao in late April, but the breeding season seems to be prolonged as females with ripe ovarian follicles were still found in April and May. Territorial songs are heard at lower altitudes as late as May, while further upslope the birds are silent at that time of year and presumably engaged in breeding activity. The Besra (Accipiter virgatus) has been recorded as a predator of young Philippine Bulbuls, and this or other goshawks might also catch adult birds.[3]

A common and adaptable bird as long as sufficient forest remains, it is not considered a threatened species by the IUCN.[4]

Source: http://en.wikipedia.org/wiki/Philippine_Bulbul

Taken: http://en.wikipedia.org/wiki/Ternate,_Cavite

Settings: 1/80 ƒ/5.6 ISO160 800mm

543
PowerShot / Re: SX50 outperforming 5DIII +100-400mm
« on: April 05, 2013, 01:31:21 PM »
Nobody says that it would beat the heavy gear at equivalent frame but despite its shortcomings, it's 600 grams of pure fun! Whether of not I lug around my heavy stuff, I now never leave home without it.
Better than a artarded digiscope but about as useful.

If I were to start from scratch I'd buy this and this alone.  ;D

At that weight and at the price I can keep upgrading continuously without any problem

544
PowerShot / Re: SX50 outperforming 5DIII +100-400mm
« on: April 05, 2013, 09:34:47 AM »
SX50's all in good for stationary objects but what about if it is moving?

545
Doesnt work... :\

546
Would anyone know of a Mac-based utility that extracts the shutter counts of the 7D, 5D Mark II, 5D Mark III, 1D Mark IV & 1D X?

Many thanks!

547
Lenses / Re: 400 2.8
« on: April 02, 2013, 09:46:12 AM »
From most ideal to least. All these must have 1.4x & 2.0x TC

600mm IS II
800mm IS
500mm IS II
400mm 2.8 IS II
300 2.8 IS II

Wildlife + birds require focal length.

548
Lenses / Re: 300mm F/2.8 non-IS... worth it?
« on: April 02, 2013, 09:36:39 AM »
Stuart,

I'd ask all the camera repair shops in the UK if they can still repair the lens if it breaks down. Ask them if they have parts available on hand.

Your lens was manufactured from 1987 to 1999 so it is possible that Canon stopped making spare parts for it.

As private mentioned $1,200 seems reasonable  even if you only get 12 months' work out of it.

549
EOS Bodies - For Stills / Re: Low level formatting of CF Card
« on: March 31, 2013, 09:12:25 PM »
To those who have discussed low level formatting of CF cards, does it matter if you format the card as Fat32 or NTFS.  I found out the hard way that Canon uses Fat 32 format, not the NTFS.  When I formatted the card in NTFS format, the card could not be read by my 5D M3, while in Fat32 format it could be read.  Of course after I formatted the card in the camera (regardless of initial format) everything was fine.

BTW - for the Mac guys/gals out there.  How does Mac deal with Fat32.  I thought they did not support it - for external drives to be readable by a Mac, they needed to be NTFS.  Is that correct?

Thanks

Why do you need to do low level formatting? Are you protecting State Secrets of Kim Jong-un?

550
Animal Kingdom / Re: Birds of the Philippines
« on: March 31, 2013, 08:50:57 PM »

Black-crowned Night Heron (Nycticorax nycticorax) by alabang, on Flickr

The scientific name, Nycticorax, means "night raven", and refers to this species' nocturnal habits and harsh crow-like call.

In the Falkland Islands, the bird is called "quark", which is an onomatopoeia similar to its name in many other languages, like "kwak" in Dutch and Frisian, "kvakoš noční" in Czech, "квак" in Ukrainian, "кваква" in Russian, "Vạc" in Vietnamese, "Kowak-malam" in Indonesian, and "Waqwa" in Quechua.

Source: Black-crowned Night Heron - Wikipedia, the free encyclopedia

Taken at Villa Encarnation II, Valenzuela City, Philippines

Settings: 1/1600 ƒ/6.3 ISO400 420mm

551
Lenses / Re: Canon EF 200 f/2L IS & EF 800 f/5.6L IS [CR2]
« on: March 29, 2013, 01:00:09 AM »
200mm & 800mm do not have Power Focus. I have both and the feature is not present. I use 300/400/500/600 Series II Super Teles and they have this feature. In fact the 400's in my drybox with the 200/300/800.

Printed user manual states 5-stops of IS.

You are taking about exposure. I am more interesting in freezing a football player in full run vs having a slightly blurred football player in full run. You obviously do not shoot action photography where a fast aperture is ideal and often required for shutter speeds of 1/1000 or faster.

High-end white telephoto prime lenses with fractional f-number stops.

http://www.canon.com/camera-museum/camera/lens/ef/data/telephoto/ef_200_18l_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/super_telephoto/ef_500_45l_usm.html

If you can't afford a $80,000 lens then you're not the market for it. :P

Change of interest and priorities can change your hobbies. :)

By 2020 I expect to hit 400-500 Philippine birds and not require the latest 800mm or longer lens by then.

552
Animal Kingdom / Re: Show your Bird Portraits
« on: March 28, 2013, 02:27:05 AM »
Great bird photos everyone!

553
Lenses / Re: Canon EF 200 f/2L IS & EF 800 f/5.6L IS [CR2]
« on: March 28, 2013, 12:23:18 AM »
SWC was introduced with the EF24mm f/1.4L II USM in the 2008 announcement. A year after 200 & 800.

200 & 800 do not have IS mode 3 & Power Focus amongst other things. New paint job is also missing. It also lacks a Kengsington lock.

200 has 5-stops of IS
- http://www.canon.com.au/For-You/Camera-Lenses/EF200mm-f2L-IS-USM-Lens
- http://www.canon.com/camera-museum/tech/report/200805/200805.html
- http://cpn.canon-europe.com/content/product/lenses/200mm_f2l.do
- http://cpn.canon-europe.com/content/education/technical/image_stabilization_lenses.do

The current 400/2.8 is 16% lighter than the 800 and does not have the separate optical front element that serves as protector. It is now integrated onto the super hard front element. This is one component that can be removed in the 200 & 800 to lessen weight.

1/3rd or 1/2 stop is a difference between stopping the action and having slight blurring. ISO can only do so much even on the flagship 1-Series. Shutter speed dictates whether the subject is frozen or has subject motion blur. ISO determines exposure amongst other things.

Canon lenses with less fractional stops.

http://www.canon.com/camera-museum/camera/lens/ef/data/wide/ef_28_18_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/standard/ef_50_f1.2l_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/standard/ef_50_18.html
http://www.canon.com/camera-museum/camera/lens/ef/data/standard/ef_50_18ii.html
http://www.canon.com/camera-museum/camera/lens/ef/data/standard/2006_ef_85_f1.2lII_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/standard/ef_85_18_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/telephoto/ef_200_18l_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/super_telephoto/ef_500_45l_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/macro/ef_50_25.html
http://www.canon.com/camera-museum/camera/lens/ef/data/macro/ef_180_35l_usm.html
http://www.canon.com/camera-museum/camera/lens/ef/data/ts-e/ts_e24_35l.html
http://www.canon.com/camera-museum/camera/lens/ef/data/ts-e/ts_e24_f35lii.html

“Size matters not. Look at me. Judge me by my size, do you? Hmm? Hmm." - Yoda

Advances in materials science  will allow for lighter 800 at a faster f-number than what was possible today. :) It'll be out in 2020, more than enough times for the optical boffins to figure things out.

$35,000 would be cheap, by 2020. :)

I can see a 4.4, 4.5, 4.8, 5.0 or 5.2 f-number in the future.

By 2020 I may not be doing photography anymore as serious as today but still...

Canon also uses nanocoatings, like Nikon's Nano Crystal Coat. It is called SWC by Canon, Subwavelength Coating. All of Canon's new lenses use SWC on multiple elements. Nikon has no advantage there. Flare control on newer Canon lenses is second to none, and one of the biggest reasons I love Canon glass.

Canon's EF 800 f/5.6 L IS was the first lens to use Canon's 4-stop IS system. That is the same 4-stop IS system that is used in the new Mark II generation of Canon teles and superteles. It is also the same 4-stop IS system used in the EF 200mm f/2 L IS. The IS system of both the 800/5.6 and 200/2 is most certainly not out of date. It is actually the current state of the art, and the system that paved the way for the Mark II 300, 400, 500, and 600 lenses.

Weight is probably only area where there can really be significant gains, although the current 800mm lens already made a fair bit of headway on that front by being almost two pounds lighter than the old 600mm f/4 L lens. Canon might be able to improve IQ as well. The 600mm f/4 L II is slightly better than the 800mm with a 1.4x TC, so there is probably something Canon can do to put the 800mm back on top. Is it worth it, though? The margin is very slim...and as a prime supertelephoto, the current 800mm is still a phenomenal lens. I've never used the 200/2, but from what I've seen, it too is a phenomenal lens capable of producing some unbelievably good images with the most mind-blowing boke you've ever seen.

When it comes to aperture, if the difference is f/1.8 vs. f/2, it is trivial, and doesn't really matter. With the insanely good high ISO performance of Canon cameras these days, a third of a stop bump in ISO is trivial.

As for the 800mm, Canon doesn't usually use intermediate f-stops for maximum aperture on their prime lenses. It would either be f/5.6 or f/4. An f/4 800mm lens would require a 200mm entrance pupil. That is GARGANTUAN! The single largest entrance pupil in Canon's entire lens lineup is the 600mm f/4, with a 150mm entrance pupil. An 800mm f/4 would require a 33% increase in front element size. The diameter of the 600mm II is 168mm, so the front element is probably exactly 150mm in size. Can you imagine a lens with a 200mm front element?!? The barrel diameter would probably be 220mm! Not only would such a lens be HUGE, it would be heavy, even with Fluorite elements...much heavier than the current 800mm f/5.6 L (which is actually still fairly light...lighter than the previous EF 600mm f/4 L by a fair margin, again thanks to Fluorite elements, as the current 800 is still a modern design).

It would certainly be an amazing lens, an EF 800mm f/4 L IS. But it would be a significant feat of engineering to make it practical for anything outside of relatively permanent, stationary use on one hell of a beasty tripod. That is nothing to say of the cost. The EF 600mm f/4 L IS II costs $13,000. The current EF 800mm f/5.6 L IS costs $13,500, and it has a smaller entrance pupil than the 600mm. I can only figure an EF 800mm f/4 L IS would cost...$25,000...maybe $35,000?

I don't see either of these lenses getting an increase in maximum aperture. Its either not logical, or not practical.

554
Lenses / Re: New 100-400 to Launch with EOS 7D Mark II [CR2]
« on: March 27, 2013, 02:19:46 PM »
What I wanna see is a 400/5.6 with 4 or more stops of IS. 100-400 zoom is nice and all but it's a zoom. I want a prime.

555
Animal Kingdom / Re: Birds of the Philippines
« on: March 26, 2013, 09:23:30 PM »
Thanks reactionart.


Eurasian Tree Sparrow (Passer montanus) by alabang, on Flickr

The Old World sparrow genus Passer is a group of small passerine birds that is believed to have originated in Africa, and which contains 15–25 species depending on the authority.[10] Its members are typically found in open, lightly wooded, habitats, although several species, notably the House Sparrow (P. domesticus) have adapted to human habitations. Most species in the genus are typically 10–20 cm (4–8 in) long, predominantly brown or greyish birds with short square tails and stubby conical beaks. They are primarily ground-feeding seed-eaters, although they also consume invertebrates, especially when breeding.[11] Genetic studies show that the Eurasian Tree Sparrow diverged from the other Eurasian members of its genus relatively early, before the speciation of the House, Pegu and Spanish Sparrows.[12][13] The Eurasian species is not closely related to the American Tree Sparrow (Spizella arborea), which is an American sparrow.[14]

The Eurasian Tree Sparrow's binomial name is derived from two Latin words: passer, "sparrow", and montanus, "of the mountains" (from mons "mountain").[3] The Eurasian Tree Sparrow was first described by Carl Linnaeus in his 1758 Systema Naturae as Fringilla montana,[15] but, along with the House Sparrow, it was soon moved from the finches (family Fringillidae) into the new genus Passer created by French zoologist Mathurin Jacques Brisson in 1760.[16] The Eurasian Tree Sparrow's common name is given because of its preference of tree holes for nesting. This name, and the scientific name montanus, do not appropriately describe this species's habitat preferences: the German name Feldsperling ("field sparrow") comes closer to doing so.[17]

Source: http://en.wikipedia.org/wiki/Eurasian_Tree_Sparrow

Taken at http://www.villaescudero.com/birdwatching.php

Settings: 1/200 ƒ/4.5 ISO1,000 600mm

Pages: 1 ... 35 36 [37] 38 39 ... 68