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Exposure Calculator

퍼블리셔: Essence Computing
가격: 0.99 USD 인 앱 구매 추가

앱 순위 ​변화

Exposure Calculator에서의 대한민국의 다운로드 수 순위 기록을 확인하세요.

순위 기록은 iOS Store 앱 스토어에서 Exposure Calculator의 인기와 시간에 따른 변화를 보여줍니다, 또한, 국가, 카테고리, 디바이스별 Exposure Calculator 의 일일 성과를 추적할 수 있습니다.

무료 회원가입 후 더 많은 정보를 확인 해보세요!​

앱 스토어 최적화​​

모든 앱들의 상위 키워드를 추적하고 시간 추이 별 앱 검색 키워드 동향을 살펴 보세요.

앱 리뷰 및 평점

앱 리뷰와 평가를 살펴보고 중요한 사용자의 피드백​을 얻으세요. 버전, 국가, 날짜 범위 등으로 나누어 버그 및 제안 사항을 찾아 앱을 개선 시키세요.

피처드

언제 어디서 앱​이 앱 스토어에 노출 되었는지 날짜, 국가, 디바이스, 섹션 별로 파악해보세요.​

앱 설명

Takes the guesswork out of what shutter speed to use. Ever struggled with an exposure meter or the camera's auto exposure system and found that it just cannot seem to determine the correct shutter speed? I have and that is why this App was written. There are tables and formulae to help you to work out the shutter speed for yourself, but that's not easy. This App takes some simple information about the lighting conditions, the f-stop of the camera and the ISO rating being used and calculates what the correct shutter speed should be. It is that simple. If you have used the pre-calculated tables before you might be suprised by the answers this App gives you but, believe me, I have implemented the formulae and the pre-calculated tables are approximations (sometimes rather wild ones). The tables do not include all f-stops, the tables do not take account the different ISO values cameras can be set to. This App does.

This App takes this information and presents it in an easy to use form. Just type in the f/stop value using the keypad, type in the ISO rating using the keypad and then select the applicable lighting conditions from the four lighting condition types: Daylight, Twilight, Night and Indoors. Each has a range of Exposure Values to select from.

The App then calculates what the effective EV value is (given the ISO rating) and so can calculate what the actual shutter speed should be. It also shows the applicable row from the standard tables for the EV.

Depending on the ISO rating being used the Exposure value selected from the list can be increased or decreased e.g. if the light is low and the EV is -3 but you are using ISO 800 then the effective Exposure value is zero (ISO 800 counts as +3 to EV) the shutter speed needs to match this value not that selected from the standard lighting condition values.

The tables only show some of f/stop values. For example the tables show f/2.0 and f/2.8 but you might have the camera set to f/2.4. Well it is possible to calculate the exact value so this is what the App does. Coupled with ISO values that do not generate exact EV numbers this value can show you the true value you should be attempting to use. An ISO of 250 adds +1.32 to the EV value. It is a log2 scale.

Now you may not be able to set you camera to the exact value given but it does give you a much better idea of the real shutter speed required rather than trying to guess from the tables (which are calculated on a logarithmic scale and are approximations).

By being able to set the ISO to 250 or 500, etc this App is can calculate the real EV value. If you set the ISO to 1000 then any EV value selected needs to have approximately 3.3 added to it to give the correct EV value. So if the selected EV is 6 then the effective EV with this ISO is actually 9.3. But there is no row for 9.3 in the standard tables and it does make a difference. If the camera is set to f/3.5 then the closest row in the table is for EV9 and f/2.8 (1/60th of a second) or f/4.0 (1/30th of a second).

So do you err towards 1/30th or 1/60th. Well this App actually calculates the exact value and this shows as 1/52nd of a second. Generally a camera cannot be set to this but it can be set to 1/50th so I would try that and then maybe 1/60th and maybe 1/40th. The calculation comes out as 1/50th because the EV is not 9 it is 9.3 and therefore with the ISO at 1000 everything must be treated as brighter and so less exposure is needed.

Being able to see the exact value to use is even more use when long exposures are needed. The standard tables get very vague for low light conditions i.e. EV -6 for f/22 is 64 minutes and for f/32 it is 128 minutes (over an hour more). So if you are using f/28 how many minutes at ISO 1250? Well the answer is 66.9 minutes which is much shorter than you might have guessed.

앱 스토어 최적화​​

앱을 검색할 때 가장 많이 사용하는 단어는? 올바른 키워드를 적어야 앱이 노출될 확률이 높아지고, 이는 곧 다운로드 및 매출 상승으로 이어집니다. App Annie는 수백 개의 키워드를 추적하여 앱의 다운로드 수가 증가하고, 경쟁자들이 사용하는 키워드를 보다 잘 이해할 수 있도록 돕습니다.

앱 리뷰 및 평점

리뷰와 평점을 통해 Exposure Calculator 에 대한 유저들의 생각을 알아보세요.

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